Seattle Department of Transportation 2018 TRAFFIC REPORT
*2017 data
CONTENTS
5 Executive Summary
7 Traffic Volumes and Speeds 8 Motor Vehicle Volumes 11 Traffic Flow Map 13 Bicycle Volumes 18 Pedestrian Volumes 21 Motor Vehicle Speeds
23 Traffic Collisions 24 Citywide Collision Rate 25 Fatal and Serious Injury Collisions 27 Pedestrian Collision Rate 30 Bicycle Collision Rate
33 Supporting Data 33 Volume Data 44 Speed Data 48 Historical Collision Data 50 2016 All Collisions 54 2016 Pedestrian Collisions 63 2016 Bicycle Collisions
75 Glossary
EXECUTIVE SUMMARY
This report presents an end of year review of This report is prepared in compliance with Seattle the core data sets the Seattle Department of Municipal Code 11.16.220, which requires the Transportation (SDOT) collects and maintains City Traffic Engineer to present an annual traffic including volumes, speeds, and collisions. The report that includes information about traffic use of this data, guided by department plans and trends and traffic collisions on City of Seattle policies, serves as the foundation for making streets. Beyond this legal requirement, the informed decisions on nearly all work at SDOT report strives to serve as an accessible reference from safety improvements to repaving to grant of Seattle traffic data and trends for all. applications. It is fundamental to measuring project performance. The breadth and depth of In gathering and compiling the information the data collected allows objective discussion of in this report, the Seattle Department of project merits and results, be it a new crosswalk Transportation does not waive the limitations on or an entire safety corridor. As the demands and this information’s discoverability or admissibility complexity of Seattle’s transportation network under 23 U.S.C § 409. grow, the information supporting decisions about that network continues to expand and now For additional information about traffic data includes significant data on pedestrians, bicycles, and collisions on Seattle streets, readers may and trucks. contact the City Traffic Engineer Dongho Chang at [email protected] or visit the SDOT webpage at www.seattle.gov/transportation/.
Linea Laird, Interim Director Dongho Chang, P.E., City Traffic Engineer Seattle Department of Transportation Seattle Department of Transportation
2018 TRAFFIC REPORT | 5 6 | SEATTLE DEPARTMENT OF TRANSPORTATION TRAFFIC VOLUMES AND SPEEDS
The Seattle Department of Transportation (SDOT) collects and maintains volume data for vehicles Traffic volumes, speeds, and (including trucks), pedestrians, and bicycles. Engineers and planners use volume data to reported collisions are the three select future project locations, support grant cardinal pieces of data traffic applications, and track the performance of traffic projects once they are installed. engineers and planners use to evaluate changes to Seattle SDOT collects vehicle speed data in addition to volume data. Speed data is particularly useful streets. for making traffic safety decisions such as those connected with traffic calming, Safe Routes to School, Seattle’s Vision Zero Plan and crossing improvements.
Speed data can also be reprocessed into vehicle classification data that categorizes vehicles in up to 13 different groups, including motorcycles, cars, and numerous types of trucks. Such data gives planners and engineers a better understanding of the movement of goods within the city.
2018 TRAFFIC REPORT | 7 MOTOR VEHICLE VOLUMES vehicle volume at 111 additional locations each SDOT is responsible for counting the volume of year. The locations of control, screen line, and traffic on certain city arterial streets each year. other regular counts are shown on maps in the Traffic counts are taken throughout the year at 20 appendix. SDOT also measures volume at ad control count locations, 164 screen line locations hoc locations throughout the year as needed for and 111 additional locations. traffic analysis and engineering studies.
At 20 locations, SDOT conducts control counts Using the annual counts taken at 19 of Seattle’s every month. These counts are used to create bridges (including I-90, SR 520, and 1st Ave S), a monthly control factor. This factor can be SDOT derives a proxy number for citywide motor applied to every count we take to adjust for vehicle average daily traffic (ADT). Traffic volumes seasonal changes in traffic. In addition, SDOT decreased by 1.8% from 2016 to 2017. The measures vehicle volume at 164 screen line following graph of Seattle’s ADT shows overall locations. These locations are identified in trend since 2006. Population, employment, and Seattle’s Comprehensive Plan, and the counts transit ridership trends are also shown in graphs, are used to determine screen line levels of along with commute mode share for context. service as required by the plan. We also measure
AVERAGE DAILY TRAFFIC IN SEATTLE 1,100,000
1,050,000
1,001,095 1,000,000
950,000
900,000
850,000 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
8 | SEATTLE DEPARTMENT OF TRANSPORTATION SEATTLE POPULATION 750,000
713,700
700,000
650,000
600,000
550,000
500,000 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
TRANSIT RIDERSHIP 180,000,000 170,580,780 170,000,000
160,000,000
150,000,000
140,000,000
130,000,000
120,000,000
110,000,000
100,000,000 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
2018 TRAFFIC REPORT | 9 AVERAGE ANNUAL EMPLOYMENT SEATTLE, TACOMA, BELLEVUE 2,100,000
2,000,000 1,985,968
1,900,000
1,800,000
1,700,000
1,600,000
1,500,000 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
2017 SEATTLE COMMUTE MODE SHARE* 1%
3% Drove Alone 11% Carpool Transit Walked Biked 51% 25% Other
9%
*2017 American Community Survey
10 | SEATTLE DEPARTMENT OF TRANSPORTATION TRAFFIC FLOW MAP In 2017 the top ten arterials for traffic volume The 2017 Traffic Flow Map is one of the products include four streets that were not on the list in of the volume counts program. The volumes on 2016: Aurora Bridge, Mercer St east of Boren Ave the map represent the Average Annual Weekday N, N 130th St east of Ashworth Ave N, Lake City Traffic (AAWDT) (5-days, 24-hour) for that section Way NE south of NE 95th St, Fremont Bridge and of roadway. A full-size version of this map is Aurora Ave N north of N 68th St. The West Seattle available on SDOT’s website at: Bridge east of the Delridge ramps continues to be www.seattle.gov/transportation/document- the busiest city street, as measured by SDOT. library/reports-and-studies
Top 10 Arterials by Volume Average Week Day Traffic (AWDT) West Seattle Bridge (EB&WB), west of Alaska Way Viaduct 100,642 East Marginal Way S, south of S Alaska St 70,352 Montlake Bridge 66,361 Aurora Bridge 61,998 Mercer St, east of Boren Ave N 60,926 Ballard Bridge 59,123 N 130th St, east of Ashworth Ave N 42,968 Lake City Way NE, south of NE 95th St 42,194 Fremont Bridge, north of Point A 41,716 Aurora Ave N, north of N 68th St 40,714
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© 2017 THE CITY OF SEATTLE. All rights reserved. S 18 0 W 0 Produced by the Seattle Department of Transportation. No warranties of any sort, including accuracy, fitness or merchantability, accompany this product. 44000 1 98 00 Coordinate System: State Plane, NAD83-91 0 Washington, North Zone PLOT DATE: 6/14/2018
AUTHOR: C Kwan 31
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12 | SEATTLE DEPARTMENT OF TRANSPORTATION BICYCLE VOLUMES Automated Bicycle Counters 2017 Census data indicate 2.8% of Seattle In October 2012, the Fremont bridge totem was residents are using bicycles as their primary installed to count bikes crossing the bridge on commute mode, down from 3.5% in 2016. Bicycle both walkways of the bridge. These counts show ridership is influenced by weather and the historic both hourly and daily patterns for bike volume and wet weather that lasted through April may have allow the effects of weather and other factors to influenced ridership. Seattle residents may utilize be evaluated. The total bike volume for 2017 was bicycle on a portion of their commute trip as more just under a million at 963,135 which represents travel options are readily available. Seattle’s bike a 2% reduction in bike volume from 2016. 2017 share survey revealed that 33% of people are experienced 108 days of rain and 11 days of snow regularly using bike share to connect to public in the first six months of the year, which may have transit while 75% indicated that they have at some affected ridership. point used bike share to access transit.
In 2017, SDOT collected bicycle volume data with three different programs: automated permanent bicycle counters at 10 locations, 83 multiday short counts, and regular spot counts at 50 intersections.
FREMONT BRIDGE BIKE COUNTS 140,000 2013 2014 2015 120,000 2016 2017 100,000
80,000
60,000
40,000
20,000
0 Jan Feb Mar Apr May June Jul Aug Sept Oct Nov Dec
2018 TRAFFIC REPORT | 13 Fremont Bridge Totem 2017 Bike Counts 6 of the 8 continuous counters combined to have less than a dozen missing days of data. Missing Total 963,135 days were replaced by taking the average of the Peak Day Tue, 23 May, 2017 (5,478) three same days before and after the missing Minimum Day Mon, 25 Dec, 2017 (48) day, as recommended by NCHRP report 797. For Max Day of the Week Wednesday example, if a Monday is missing the three Mondays Hourly Average 110 before and after that day are averaged and used to replace the missing data. The Broadway Cycle Daily Average 2,639 Track and 39th Ave Greenway both had too much Average Workday 3,138 missing data to average over the issue so the Traffic data was replaced with a regression equation Average Weekend 1,403 that used the day of year, Fremont bridge counts, Traffic and Spokane St bridge counts to estimate the Weekly Average 18,471 replacement data. Monthly Average 80,316
2017 marks the fifth continuous year of full counts from ten permanent bike counters that were installed at the end of 2013 on multi-use trails and neighborhood greenways. These counters capture bike volume by direction; additionally, three locations capture pedestrian volume. These counts give a better illustration of daily bike ridership throughout the city.
Permanent counters that have reliable data for current and past year will be used to track bicycle ridership trends. A map with all the permanent bike counter locations can be found in the appendices as well as the overall numbers from each counter. Eight continuous counters were used to create day of year factors for 2017. The short counts were then factored up into yearly bike volume estimates based on these factors. Using daily factors provides for the estimates to be within 15% of the actual values when we have at least six days of data (as per NCHRP report 797).
14 | SEATTLE DEPARTMENT OF TRANSPORTATION Site 2016 Annual Count 2017 Annual Count 26th Ave SW Greenway at SW Oregon St Total 29,469 34,419 2nd Avenue Display 247,708 236,762 BGT North of NE 70th St 405,393 374,871 Broadway Cycle Track 114,399 106,515 Elliott Bay Trl in Myrtle Edwards Park 411,192 396,574 Fremont Bridge Totem 982,470 963,135 MTS Trl West of I-90 Bridge 231,177 234,122 Spokane St. Bridge Total 297,474 275,536
Multiday Short Counts Using data from our permanent counters we In 2017 we conducted 83 machine short counts created daily volume factors that allowed us to in different parts of the city in addition to the extrapolate our short counts into annual volume spot counts. These counts are a better indication estimates for each short count location (as per of bike ridership since they capture at least one NCHRP report 797). This data, along with that week of data instead of the 2-hour window of from our permanent counters, is mapped on the the spot counts. Some of these counts support next page as annual average daily bicycle volume. the Bicycle Master Plan’s ridership performance Because of the high seasonal variation in bike measure and will be counted on annual basis. volumes, the daily summer volume is often three times the annual average daily volume. Similarly, the daily volume in the winter is lower.
2018 TRAFFIC REPORT | 15 2017 AVERAGE DAILY BIKE VOLUMES
Annual Average Daily Bike Volume 1,000 500 ! 100 !!! ! 50 10
Trails for Bikes
16 | SEATTLE DEPARTMENT OF TRANSPORTATION Spot Bike Counts In 2017, the quarterly citywide program counted In 2011 SDOT began a systematic bicycle 22,001 cyclists for the months of January, May counts program that uses National Bicycle and and September. The overall number of cyclists Pedestrian Documentation (NBPD) methodology counted increased by 4,808 at these valid count to count bicycles and pedestrians at 50 locations locations. We also conduct short counts in citywide multiple times a year. In 2017 these different locations and have permanent counters. counts were conducted in January, May, and These counts provide a better assessment on September. Each month counts are collected daily ridership due to longer periods of counts. for PM peak (5-7 PM), off peak (10 AM-noon), From the NBPD count analysis Fremont Ave N and Saturday (noon-2 PM) time periods at each and N 34th St showed the most overall ridership location. In 2014 we removed the July counts with 2,917 total riders. since the days these were conducted landed on the week of July 4th. We observed that these counts don’t correctly show true ridership numbers.
NBPD BIKE COUNT ANNUAL TREND 16,000 Autumn Spring 14,000 Winter
12,000
10,000 9,560 8,388 8,000
6,000
4,063 4,000
2,000
0 2011 2012 2013 2014 2015 2016 2017
2018 TRAFFIC REPORT | 17 PEDESTRIAN VOLUMES Quarterly Citywide Pedestrian Counts Beginning in 2011, SDOT began collecting In 2011, SDOT started using the National quarterly citywide counts using the National Bicycle and Pedestrian Documentation Bike and Pedestrian Documentation(NBPD) project methodology for counting bicycles methodology. Pedestrian volume is also being and pedestrians. These spot counts provide recorded at the newly installed permanent multi- consistent, annual pedestrian volumes that we use trail counter locations. The map if these can track over time. Each count is conducted locations can be found in the appendices. at an intersection and records the number of pedestrians crossing each leg of the intersection. Since these counts are collected in conjunction with the quarterly bicycle counts, they share the January, May, and September count dates as well as the PM Peak (5-7pm), off peak (10am-noon) and Saturday (noon-2pm) time periods.
NBPD PEDESTRIAN COUNT ANNUAL TREND 120,000 Autumn Spring 110,000 109,481 Winter 105,517 100,000 93,681 90,000
80,000
70,000
60,000
50,000 2011 2012 2013 2014 2015 2016 2017
18 | SEATTLE DEPARTMENT OF TRANSPORTATION The ongoing program expands SDOT’s pedestrian The total number of pedestrians counted in data beyond the city center; it also provides 2017 by the program was 308,679. The busiest insight into seasonal and daily pedestrian pedestrian location counted in 2017 was again patterns. A chart of the trends in this data is Broadway and East Olive Street with 28,899 total presented. In general, volumes have consistently pedestrians counted, this location also had the increased for each season year over year. most pedestrians counted previous years. The following map shows the total pedestrian volumes for each location counted in 2017. Details of the 2017 counts by location are available on the web at http://data.seattle.gov.
2018 TRAFFIC REPORT | 19 AVERAGE VOLUMES FOR 2017 PEDESTRIAN COUNTS
Average Pedestrian Volume 2017 NBPD Counts
Symbols Proportional to Volume Representative Scale Below
1100 2100 3800 6100
9000
13700
28900
20 | SEATTLE DEPARTMENT OF TRANSPORTATION MOTOR VEHICLE SPEEDS percent of traffic travels. The high-end speeder Starting in 2010, SDOT began collecting speed percentage is the percentage of drivers who data at consistent locations each year, in addition exceed the posted speed limit by 10 miles per to the ad-hoc locations that serve site-specific hour or more. traffic evaluation needs. SDOT also collects vehicle speeds for purposes of traffic safety Aurora Ave N, Stone Way N, Fauntleroy Avenue investigations, prospective project selection and SW, 24th Avenue NW, and Rainier Avenue S design, and for evaluation of completed projects. are all specified in the Pedestrian Master Plan as locations to report on trends in the 85th Engineers gauge speed several different ways, percentile speed of traffic. The 2017 results for including the 85th percentile speed of traffic these locations are listed in the table below. and high-end speeder percentage. The 85th For more results of the speed studies program, percentile measure is the most commonly used see the Supporting Data section. and represents the speed at or below which 85
85th Percentile High End Speeder Location Direction Speed Percentage Speed Limit Aurora Ave N, S/O N 112th St SB 42.1 5.1% 35 Aurora Ave N, S/O N 112th St NB 41.9 4.9% 35 Stone Way N, S/O N 45th St SB 25.2 0.0% 30 Stone Way N, S/O N 45th St NB 23.3 0.0% 30 24th Ave NW, S/O NW 80th St NB 31.4 0.5% 30 25th Ave NW, S/O NW 80th St SEB 30.8 0.4% 30 Rainier Ave S, SE/O S Warsaw St NWB 38.9 11.0% 30 Rainier Ave S, SE/O S Warsaw St SE 36.9 6.2% 30 Fauntleroy Way SW, S/O SB 23.0 0.0% 30 SW Hudson St Fauntleroy Way SW, S/O NB 22.6 0.0% 30 SW Hudson St
2018 TRAFFIC REPORT | 21
TRAFFIC COLLISIONS
While most collisions result from human error or inattention, collision data can be used to There were 10,959 collisions help gauge the effectiveness of engineering and enforcement efforts. Collision data helps in 2017 on Seattle streets identify locations that may benefit from reported by police. additional engineering treatments or enhanced enforcement efforts.
There were 10,959 police reported collisions on Seattle streets in 2017. In addition, there were 1,516 self-reported collisions, which are not included in our analysis due to reliability and completeness factors. The number of Seattle collisions increased slightly since 2013 and remains near historically low levels. The trend for all types of reports is listed on the Supporting Data section.
POLICE REPORTED COLLISIONS ON SEATTLE STREETS 16,000
15,000
14,000
13,000
12,000
11,000 10,959 10,000
9,000 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
2018 TRAFFIC REPORT | 23 CITYWIDE COLLISION RATE in this case, it has been adjusted to exclude The collision rate decreased by 1.8% from 2016 volumes on I-5, I-90 and SR-520 because our to 2017. collision data do not include collisions on these roadways. The 16th Ave S Bridge counts have The rate that SDOT uses is the number of been included into the ADT. The count for 2014 police reported collisions per Average Annual has been added to the years 2011, 2012 and 2013 Daily Trips (AADT). The AADT used is a citywide since the counts were not done that year due to approximation of arterial traffic volumes and closure for construction.
Police Reported Average Daily Citywide Collision Year Collisions Traffic AADT Rate 2006 15,625 555,997 202,938,905 77.0 2007 14,971 523,342 191,019,830 78.4 2008 14,037 531,930 194,154,450 72.3 2009 12,101 525,758 191,901,732 63.1 2010 11,288 541,170 197,527,114 57.1 2011 11,240 529,988 193,445,620 58.1 2012 10,614 524,732 191,527,180 55.4 2013 10,310 528,174 192,783,510 53.5 2014 10,815 549,655 200,624,075 53.9 2015 10,930 539,600 196,954,000 55.5 2016 11,603 539,106 196,773,690 59.0 2017 10,959 518,187 189,138,255 57.9
CITYWIDE COLLISION RATE 90.0
85.0
80.0
75.0
70.0
65.0 59.0 57.9 60.0
55.0 Collisions per Million AADT Trips AADT Million per Collisions 50.0 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
24 | SEATTLE DEPARTMENT OF TRANSPORTATION FATAL AND SERIOUS INJURY COLLISIONS In 2017, there were 19 fatalities on Seattle This chart below shows the trend of fatal and streets. These numbers do not include serious injury collisions on Seattle streets since incidents on limited access State Highways 2006. The City of Seattle is committed to and Interstates, but do include incidents on the Vision Zero - our goal of ending traffic deaths and Alaskan Way Viaduct. Details of each fatality and serious injuries on city streets by 2030. In 2017 there tables of historical trends can be found in the were a total of 187 fatal and serious injury collisions. appendices.
FATAL/SERIOUS INJURY COLLISION TREND 350 Serious Injury
300 Fatal
250
200
150
100 168
50
0 1919 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
TRAFFIC FATALITIES ON SEATTLE STREETS 45 Total 40 Pedestrian Motorcycle 35 Cyclist Linear (Total) 30 25 20 19 15 10 11 5 3 0 2 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
2018 TRAFFIC REPORT | 25 2017 SERIOUS AND FATAL COLLISION LOCATIONS ON SEATTLE STREETS G G q Pedestrian Fatality N Bicycle Fatality G !G G Motorcycle Fatality J! G G G j Vehicle Fatality G G G G G G Serious Injury qG G j G Collision Gj G G G Numbers indicate multiple G G G G G fatalities G G qG G G
G G G G qq G G G G G G GG G jG G G G G G G G G GG G G G G G GG G G G G G G GG G G GG GG G G G G G qG G GG GG G GGGGGG qGGG GG G G GGG G qG G GG J! G G G G G G qGG G G GG G G G G G G G G G qGG G! G G J! G G G G G G G J! G GG G G !G G G G G G G G G G G G G qG G q G G
26 | SEATTLE DEPARTMENT OF TRANSPORTATION PEDESTRIAN COLLISION RATE The pedestrian collisions per 100,000 inhabitants The 2009 Pedestrian Master Plan defined a decreased by 3.8% from 2016 to 2017. The total decreasing trend in the rate of collisions involving number of pedestrian serious injury and fatality pedestrians as a safety goal. SDOT continues collisions increased by 11.6% from 66 in 2016 to 73 to measure its pedestrian collision rate as the in 2017. number of pedestrian collision divided by the population of the City of Seattle.
PEDESTRIAN-INVOLVED COLLISION RATE PER 100,000 RESIDENTS 110 Collision Rate Linear (Collision Rate) 100
90
80 75 70
60
50 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
PEDESTRIAN COLLISIONS AND INJURIES 70
62 60
50
40
30 Serious Injury Collisions 20 Fatal Collisions Linear (Serious Injury Collisions) 10 11
0 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
2018 TRAFFIC REPORT | 27 2017 PEDESTRIAN COLLISIONS ON SEATTLE STREETS
! ! ! !
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! ! ! ! ! ! ! ! ! ! ! ! ! ! !
!
28 | SEATTLE DEPARTMENT OF TRANSPORTATION 2018 TRAFFIC REPORT | 29 BICYCLE COLLISION RATE ACS number is the best proxy SDOT has for the The chart below shows the bicycle collision rate total number of cycling trips in the City of Seattle. as a factor of the number of bicycle commuters The bicycle collision rate shows a decreasing as reported by the U.S. Census Bureau’s trend since 2006 when Seattle’s Bicycle Master Amercian Community Survey (ACS). Currently, the Plan was implemented.
Bicycle Seattle Bicycle Bicycle-Involved Bike Collision Year Collisions Population Commuters (ACS) Collisions Per Capita Rate 2005 293 573,296 6,963 0.00051108 42 2006 365 580,485 7,330 0.000628785 50 2007 356 589,304 7,336 0.000604102 49 2008 365 598,541 9,953 0.000609816 37 2009 383 602,000 10,593 0.000636213 36 2010 364 610,383 12,306 0.000596347 30 2011 362 622,354 11,986 0.000581663 30 2012 387 635,521 15,007 0.000608949 26 2013 421 653,713 12,983 0.000644014 32 2014 380 669,112 14,185 0.000567917 27 2015 483 684,451 16,251 0.000705675 30 2016 439 704,352 14,801 0.000623268 30 2017 402 713,700 11,976 0.000563262 34
BICYCLE COLLISION RATE PER 1,000 COMMUTERS 60 Collision Rate Linear (Collision Rate) 50
40 34 30
20
10
0 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
30 | SEATTLE DEPARTMENT OF TRANSPORTATION COLLISIONS INVOLVING PEOPLE BIKING 500 BICYCLE COLLISION RATE PER BICYCLE 1000 COMMUTERS 2017 rate will be updated when ACS data is available 450 60
40050 393
35040 34345
30 300
20 250 Total Collisions Fatal and Serious Injury 10 and Injury Collisions 200 20060 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
SERIOUS AND FATAL COLLISIONS FOR BICYCLES 70 Serious Injury Fatal Collisions 60
50
40
30
20 19
10
2 0 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
2018 TRAFFIC REPORT | 31 2017 BICYCLE COLLISIONS ON SEATTLE STREETS
! ! ! N Bicycle Collisions ! ! N ! ! ! ! 1 ! W E ! ! ! ! 2 S ! ! ! 3 ! ! ! 4
! 5 ! ! ! ! ! ! ! 6 ! ! ! ! ! ! ! ! ! ! ! 7 ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! !! ! ! ! !! ! ! ! ! ! ! !! ! !! !!! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! !! ! ! ! ! ! ! !!!! ! !! ! ! ! ! !
! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! !!!! ! ! ! !! ! ! ! ! ! ! ! !! ! !! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! !!! !!! !! ! ! !!! ! ! ! ! ! !! ! !! ! ! ! ! !!! ! !! ! ! !! ! !! ! !! ! ! ! ! !! !!! ! ! ! ! !! ! ! ! ! ! ! !! ! ! ! ! ! ! ! !!! ! ! ! ! ! ! ! ! ! ! ! ! ! !!! !! ! ! ! ! ! ! ! !! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! !
! ! ! ! ! ! ! ! ! !
! ! ! ! ! !!!
!
32 | SEATTLE DEPARTMENT OF TRANSPORTATION SUPPORTING DATA
VOLUME DATA 2017 Bridge Count Locations These locations are counted every month. The 1. Aurora Bridge resulting counts (except the West Seattle Bridge) 2. Ballard Bridge are added together and divided by 12 to determine 3. Fremont Bridge a monthly control factor. This factor can then be applied to counts to correct for seasonal variation. 4. Montlake Bridge 5. Spokane Street Corridor (Duwamish West Control Count Locations Waterway) 1. Denny Way, w/o 2nd Ave 6. West Seattle Bridge (High-rise) 2. E Madison St, sw/o 17th Ave 7. SW Spokane Bridge (Swing) 3. East Green Lake Way N, ne/o N 57th St 8. University Bridge 4. Fremont Br, s/o Point A 9. 1 Ave S Bridge 5. N 85th St, w/o Ashworth Ave N 10. 16th Ave S Bridge (closed – not counted in 2013) 6. Queen Anne Ave N, s/o Crockett St 11. 1-90 Bridge 7. University Br, sw/o Point A 12. SR520 Bridge 8. Lake City Way NE, ne/o NE 95th St 13. I-5 Bridge 9. M L King Jr. Way S, n/o S Andover St 10. NW Market St, w/o 8th Ave NW Average Daily Traffic 11. Rainier Ave S, s/o S Othello St Year in Seattle 12. S Lander St, w/o 6th Ave S 2007 1,006,782 13. Alki Ave SW, w/o Harbor Ave SW 2008 1,017,930 14. 3rd AVE se/o Union ST 2009 999,465 15. Alaskan Way se/o Blanchard 2010 1,010,870 16. Stewart St, ne/o 4th Ave 2011 1,005,616 17. University St, sw/o 4th Ave 2012 976,625 18. East Marginal Way S, s/o S Alaska St 2013 986,174 19. West Seattle Bridge, ne/o Fauntleroy 2014 1,009,764 20. SW Spokane Bridge, w/o SW Spokane St 2015 972,112 2016 1,019,295 2017 1,001,095
2018 TRAFFIC REPORT | 33 2017 Monthly Expansion Factor JAN FEB MAR APR MAY JUN Count 458,227 480,726 472,441 434,313 470,974 486,489 Factor 1.017 0.97 0.987 1.073 0.99 0.958 JUL AUG SEP OCT NOV DEC Count 481,437 458,150 479,272 446,534 457,192 468,648 Factor 0.968 1.018 0.973 1.044 1.02 0.995
2017 Top Arterial Traffic Counts Location AAWDT Scaled West Seattle Bridge (EB&WB), west of Alaska Way Viaduct 100,642 East Marginal Way S, south of S Alaska St 70,352 Montlake Bridge 66,361 Aurora Bridge 61,998 Mercer St, east of Boren Ave N 60,926 Ballard Bridge 59,123 N 130th St, east of Ashworth Ave N 42,968 Lake City Way NE, south of NE 95th St 42,194 Fremont Bridge, north of Point A 41,716 Aurora Ave N, north of N 68th St 40,714 Elliott Ave W, southeast of W Mercer Pl 44,500 Lake City Way NE, s/o NE 145th St 42,900 1st Ave S, n/o S Royal Brougham Way 40,600 NE 45th St, w/o NE 45th Pl 40,000 Denny Way, w/o 2nd Ave 39,100 Mercer St, e/o Taylor Ave N 38,000 Aurora Ave N, n/o N 115th St 37,000
34 | SEATTLE DEPARTMENT OF TRANSPORTATION Year Seattle Population Year Seattle/Tacoma/Bellevue Employment 2006 580,485 2006 1,702,077 2007 589,304 2007 1,744,923 2008 598,541 2008 1,768,195 2009 602,000 2009 1,724,562 2010 610,383 2010 1,710,769 2011 622,354 2011 1,722,178 2012 635,521 2012 1,765,426 2013 653,713 2013 1,796,317 2014 669,112 2014 1,836,144 2015 684,451 2015 1,874,467 2016 704,352 2016 1,935,205 2017 713,700 2017 1,985,968
Annual Transit Ridership Metro Access Taxi CAT* Total Transit Year Ridership Boardings Boardings Boardings ST Boardings Ridership 2006 103,242,414 1,128,496 40,474 129,460 12,256,022 116,796,866 2007 110,600,190 1,118,400 35,320 141,368 13,764,711 125,659,989 2008 118,824,795 1,121,776 34,046 155,456 16,128,142 136,264,215 2009 111,717,152 1,119,927 34,320 211,417 18,810,635 131,893,451 2010 109,583,654 1,229,039 32,502 250,369 22,802,673 133,898,237 2011 112,766,328 1,221,392 32,352 303,428 25,079,792 139,403,292 2012 115,410,304 1,164,935 31,228 312,795 28029,348 144,948,610 2013 118,629,373 1,158,467 31,271 316,723 30,379,713 150,515,547 2014 120,950,922 1,079,309 27,490 342,989 32,996,287 155,396,997 2015 121,849,972 980,086 24,059 362,461 34,860,000 158,069,578 2016 121,547,394 961,478 20,156 347,550 42,738,763 165,615,341 2017 122,233,133 958,439 17,162 340,265 47,031,781 170,580,780
*Community Access Transit
2018 TRAFFIC REPORT | 35 SDOT BIKE AND PEDESTRIAN SPOT COUNT LOCATIONS
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36 | SEATTLE DEPARTMENT OF TRANSPORTATION SDOT SCREENLINE TRAFFIC VOLUME COUNT LOCATIONS
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2018 TRAFFIC REPORT | 37 SDOT FLOW MAP TRAFFIC VOLUME COUNT LOCATIONS
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38 | SEATTLE DEPARTMENT OF TRANSPORTATION Permanent Bike Counters P Bike with Display ! " Bike and Pedestrian Linden Ave N ! Bike south of N 135th St
Burke Gilman Trail north of NW 58th St NE 70th St east of 22nd Ave NW 39th Ave " NE south of ! ! NE 62nd St Fremont Bridge !P
Elliott Bay Trail in Myrtle Broadway PBL Edwards Park between Pike St and Union St " ! !P 2nd Ave PBL south of Madison " S Spokane St Bridge MTS Trail (I-90) at !P Lakeside Ave S !
26th Ave SW south of SW Oregon St - Delridge Greenway Chief Sealth Trail north of S Thistle St "
2018 TRAFFIC REPORT | 39 Fremont Bridge Total Month 2012 2013 2014 2015 2016 2017 January n/a 44,884 59,873 60,630 51,733 49,805 February n/a 50,027 47,025 58,659 60,381 42,001 March n/a 66,089 63,494 71,144 69,804 58,747 April n/a 71,998 86,855 83,697 93,639 68,413 May n/a 108,574 118,644 107,775 114,159 109,089 June n/a 99,280 110,907 113,717 107,617 107,801 July n/a 117,974 120,669 112,780 105,683 118,904 August n/a 104,549 112,490 103,351 112,380 120,188 September n/a 80,729 97,558 91,140 94,157 96,498 October n/a 81,352 83,184 83,003 69,883 88,143 November 50647 59,270 56,990 56,668 64,097 57,684 December 36369 43,553 48,507 43,992 38,937 45,862
2017 Machine Bicycle Counts Calculated Annual Average Location Count Type Bike Volume Fremont Bridge Totem Continuous Counter 2,640 Westlake East Rdwy Ave N s/o Newton St Short Duration Count 1,470 BGT North of NE 70th St Continuous Counter 1,420 Burke Gilman Trl e/o 9th Ave NW Continuous Counter 1,280 Elliot Bay Trl in Myrtle Edwards Park Continuous Counter 1,090 Montlake Bridge (north approach of Br) Short Duration Count 1,040 MTS I-90 Trail Continuous Counter 790 Spokane St Bridge Continuous Counter 750 2nd Ave Cycle Track Continuous Counter 650 Eastlake Ave E ne/o Fuhrman Ave E Short Duration Count 620 Gilman Ave W n/o W Bertona St Short Duration Count 430 Dexter Ave N n/o Denny Short Duration Count 420 Mercer St w/o Aurora Ave N Short Duration Count 410 Lake Washington Blvd S n/o S Horton St Short Duration Count 390 Roosevelt Way NE s/o NE 45th St Short Duration Count 350 Greenlake Way N s/o N 54th St Short Duration Count 300 Broadway Cycle Track Continuous Counter 290 NE 40th St e/o Brooklyn Ave NE Short Duration Count 270 Fremont Ave N n/o N 86th St Short Duration Count 230 Haiwatha Pl se/o Charles St Short Duration Count 200
40 | SEATTLE DEPARTMENT OF TRANSPORTATION 2017 Machine Bicycle Counts Calculated Annual Average Location Count Type Bike Volume 14th Ave W n/o W Nickerson St Short Duration Count 200 17th Ave NW s/o NW 53rd St Short Duration Count 180 Pike St w/o Terry Ave Short Duration Count 180 39th Ave NE s/o NE 55th St Short Duration Count 170 39th Ave Greenway at 62nd St Continuous Counter 150 W Boston St e/o 1st Ave W Short Duration Count 150 17th Ave NW n/o NW 57th St Short Duration Count 130 Greenwood Ave N s/o N 85th St Short Duration Count 120 17th Ave NW s/o NW 65th St Short Duration Count 120 NW 58 St Greenway at 22nd Ave NW Continuous Counter 120 39th Ave NE s/o NE 68th St Short Duration Count 110 39th Ave NE s/o NE 73rd St Short Duration Count 100 Duwamish River Trl nw/o S Holden St Short Duration Count 100 12th Ave NE s/o NE 50th St Short Duration Count 90 NW Dock Pl sw/o Leary Ave NW Short Duration Count 80 39th Ave NE s/o NE 80th St Short Duration Count 80 26th Ave SW at Oregon St Continuous Counter 80 NW Dock Pl sw/o Russell Ave NW Short Duration Count 80 12th Ave NE n/o NE 50th St Short Duration Count 80 22nd Ave SW n/o SW Andover St Short Duration Count 70 Fauntleroy Way SW sw/o California Ave SW Short Duration Count 70 21st Ave SW s/o SW Genesee St Short Duration Count 70 N 44th St w/o Corliss Ave N Short Duration Count 60 E Republican St w/o 16th Ave E Short Duration Count 60 NW 83rd St w/o 8th Ave NW Short Duration Count 60 21st Ave SW s/o 22nd Ave SW Short Duration Count 60 25th Ave S n/o S Grand St Short Duration Count 60 17th Ave NW n/o NW 75th St Short Duration Count 60 22nd Ave n/o E Union St Short Duration Count 50 1st Ave NW n/o NW 78th St Short Duration Count 50 NE 130th St e/o 20th Ave Ne Short Duration Count 50 1st Ave NW n/o NW 82nd St Short Duration Count 50 38th Ave NE s/o NE 88th St Short Duration Count 50 25th Ave S s/o S Jackson St Short Duration Count 50 17th Ave NW n/o NW 80th St Short Duration Count 40
2018 TRAFFIC REPORT | 41 2017 Machine Bicycle Counts Calculated Annual Average Location Count Type Bike Volume 25th Ave S n/o S Jackson St Short Duration Count 40 Burke Ave N n/o N 43rd St Short Duration Count 40 20th Ave NE n/o NE 130th St Short Duration Count 40 22nd Ave n/o E Columbia St Short Duration Count 40 25th Ave n/o E Yesler Way Short Duration Count 40 N 43rd St w/o Wallingford Ave N Short Duration Count 40 25th Ave s/o E Cherry St Short Duration Count 40 26th Ave S n/o S Judkins W St Short Duration Count 40 21st Ave SW n/o SW Myrtle St Short Duration Count 40 E Pine St e/o 21st Ave Short Duration Count 40 25th Ave n/o E Cherry St Short Duration Count 30 22nd Ave E n/o E Lynn St Short Duration Count 30 27th Ave NE n/o NE 130th St Short Duration Count 30 E Columbia St e/o 24th Ave Short Duration Count 30 NE 44th St w/o Latona Ave N Short Duration Count 30 21st Ave SW s/o SW Dakota St Short Duration Count 30 17th Ave SW n/o SW Henderson St Short Duration Count 20 E Galer St w/o 20th Ave E Short Duration Count 20 Interlaken Pl E nw/o E Galer St Short Duration Count 20 38th Ave NE s/o NE 85th St Short Duration Count 20 15th Ave SW n/o SW Holden St Short Duration Count 20 20th Ave E s/o E Galer St Short Duration Count 20 NE 89th St w/o 38th Ave NE Short Duration Count 20 21st Ave E n/o E Aloha St Short Duration Count 20 Sodo Trail n/o S Forest St Short Duration Count 20 21st Ave E s/o E Republican St Short Duration Count 20 17th Ave SW n/o SW Cambridge St Short Duration Count 10 21st Ave E s/o E Aloha St Short Duration Count 10 Renton Ave S se/o S Bennett St Short Duration Count 10 45th Ave SW n/o SW Dakota St Short Duration Count 10 E Pine St e/o 25th Ave Short Duration Count 10 NE 125th St e/o 12th Ave NE (EB) Short Duration Count 10 18th Ave SW n/o SW Webster St Short Duration Count 10 Ashworth Ave N s/o N 97th St Short Duration Count 10 SW Trenton St w/o 13th Ave SW Short Duration Count 10
42 | SEATTLE DEPARTMENT OF TRANSPORTATION 2017 Machine Bicycle Counts Calculated Annual Average Location Count Type Bike Volume 24th Ave S n/o S Hill St Short Duration Count 10 15th Ave SW n/o SW Kenyon St Short Duration Count 4 17th Ave SW s/o SW Thistle St Short Duration Count 4
2018 TRAFFIC REPORT | 43 SPEED DATA
85th High End Speed Percentile Speeder Location Direction Limit speed Percentage 12th Ave, n/o E Yesler Way N 25 28.0 1.0% 12th Ave, n/o E Yesler Way S 25 22.5 0.3% 14th Ave S, n/o S Director St S 30 35.7 3.7% 14th Ave S, n/o S Director St N 30 35.0 2.9% 15th Ave NE, s/o NE 65th St S 30 33.0 0.9% 15th Ave NE, s/o NE 65th St N 30 30.8 0.4% 15th Ave S, s/o S Bradford St S 30 38.4 9.2% 15th Ave S, s/o S Bradford St N 30 35.9 3.6% 1st Ave S, s/o S Spokane Sr St S 35 42.7 7.5% 1st Ave S, s/o S Spokane Sr St N 35 38.7 2.3% 20th Ave W, s/o W Dravus St S 30 36.3 3.1% 20th Ave W, s/o W Dravus St N 30 35.1 1.8% 23rd Ave S, s/o S Jackson St N 30 34.6 2.7% 23rd Ave S, s/o S Jackson St S 30 33.7 1.5% 24th Ave NW, s/o NW 80th St N 30 31.4 0.5% 24th Ave NW, s/o NW 80th St S 30 30.8 0.4% 25th Ave NE, s/o NE 75th St S 30 32.7 0.5% 25th Ave NE, s/o NE 75th St N 30 30.3 0.3% 35th Ave NE, n/o NE 75th St S 30 33.7 1.2% 35th Ave NE, n/o NE 75th St N 30 32.2 0.4% 35th Ave SW, s/o SW Alaska St N 35 36.5 1.0% 35th Ave SW, s/o SW Alaska St S 35 34.0 0.4% 4th Ave S, n/o S Michigan St S 35 37.8 1.0% 4th Ave S, n/o S Michigan St N 35 35.3 0.6% 4th Ave S, s/o Seattle Blvd S N 25 36.5 20.7% 4th Ave S, s/o Seattle Blvd S S 25 36.4 22.5% 5th Ave NE, n/o NE Northgate Way N 30 27.5 0.3% 5th Ave NE, n/o NE Northgate Way S 30 27.3 0.3% 5th Ave NE, s/o NE Northgate Way S 30 31.6 0.6% 5th Ave NE, s/o NE Northgate Way N 30 28.3 0.1% 8th Ave NW, s/o NW 80th St S 30 31.5 0.4% 8th Ave NW, s/o NW 80th St N 30 30.5 0.3% Airport Way S, se/o S Lucile St NW 30 22.1 0.1% Airport Way S, se/o S Lucile St SE 30 19.3 0.0%
44 | SEATTLE DEPARTMENT OF TRANSPORTATION 85th High End Speed Percentile Speeder Location Direction Limit speed Percentage Alki Ave SW, w/o Harbor Ave SW W 30 35.4 2.3% Alki Ave SW, w/o Harbor Ave SW E 30 34.4 1.2% Aurora Ave N, s/o N 112th St S 35 42.1 5.1% Aurora Ave N, s/o N 112th St N 35 41.9 4.9% Corson Ave S, ne/o S Michigan St SW 30 36.2 5.5% Corson Ave S, ne/o S Michigan St NE 30 34.5 1.7% Corson Ave S, sw/o S Michigan St SW 30 31.8 1.2% Corson Ave S, sw/o S Michigan St NE 30 25.7 0.0% Delridge Way SW, nw/o SW Cambridge St SE 30 33.0 0.6% Delridge Way SW, nw/o SW Cambridge St NW 30 32.5 0.3% E Aloha St, e/o 10th Ave E E 30 24.3 0.0% E Aloha St, e/o 10th Ave E W 30 23.6 0.0% Eastlake Ave E, sw/o Harvard Ave E SW 30 35.1 2.5% Eastlake Ave E, sw/o Harvard Ave E NE 30 32.0 0.4% Elliott Ave, nw/o Lenora St SE 25 26.1 0.5% Fauntleroy Way SW, n/o SW Barton St N 30 34.6 1.9% Fauntleroy Way SW, n/o SW Barton St S 30 33.9 0.7% Fauntleroy Way SW, s/o SW Hudson St S 30 23.0 0.0% Fauntleroy Way SW, s/o SW Hudson St N 30 22.6 0.0% Lake City Way NE, ne/o NE 95th St NW 35 No Data No Data Lake City Way Ne, ne/o NE 95th St SW 35 No Data No Data Lake Washington Blvd E, nw/o E Madison St NW 25 29.7 1.1% Lake Washington Blvd E, nw/o E Madison St SE 25 27.6 0.8% Mercer St, w/o 6th Ave N W 25 33.0 9.2% Mercer St, w/o Fairview Ave N E 25 35.0 15.0% Meridian Ave N, s/o N 145th St S 30 31.4 0.4% Meridian Ave N, s/o N 145th St N 30 29.6 0.2% N 130th St, w/o Linden Ave N E 30 36.2 3.8% N 130th St, w/o Linden Ave N W 30 33.7 1.2% N 145th St, w/o Linden Ave N E 35 41.3 4.2% N 145th St, w/o Linden Ave N W 35 40.8 3.7% N 145th St, w/o Meridian Ave N W 35 38.8 1.4% N 145th St, w/o Meridian Ave N E 35 38.3 1.3% N 65th St, w/o Linden Ave N W 30 30.1 0.1% N 65th St, w/o Linden Ave N E 30 28.0 0.0% N 80th St, w/o Linden Ave N W 30 30.7 0.2%
2018 TRAFFIC REPORT | 45 85th High End Speed Percentile Speeder Location Direction Limit speed Percentage N 80th St, w/o Linden Ave N E 30 30.4 0.2% N Northgate Way, w/o Ashworth Ave N W 30 37.9 7.9% N Northgate Way, w/o Ashworth Ave N E 30 36.5 4.1% NE 75th St, e/o 12th Ave NE W 30 33.2 0.7% NE 75th St, e/o 12th Ave NE E 30 32.3 0.9% NE 80th St, e/o 5th Ave NE W 30 No Data No Data NE 80th St, e/o 5th Ave NE E 30 29.4 0.5% Queen Anne Ave N, s/o Crockett St S 30 20.5 0.2% Queen Anne Ave N, s/o Crockett St N 30 18.7 0.0% Rainier Ave S, se/o S Warsaw St NW 30 38.9 11.0% Rainier Ave S, se/o S Warsaw St SE 30 36.9 6.2% Renton Ave S, n/o S Cloverdale St N 30 36.0 4.0% Renton Ave S, n/o S Cloverdale St S 30 35.8 3.3% Renton Ave S, se/o S Bangor St NW 30 No Data No Data Renton Ave S, se/o S Bangor St SE 30 35.3 2.5% Roosevelt Way NE, n/o NE 73rd St S 30 28.6 0.2% Roosevelt Way NE, s/o NE Northgate Way S 30 31.1 0.2% Roosevelt Way NE, s/o Ne Northgate Way N 30 31.0 1.0% S Columbian eb Way, nw/o 14th Ave S SE 35 39.3 1.3% S Columbian wb Way, nw/o 14th Ave S NW 35 38.5 1.1% S Henderson St, e/o Renton Ave S W 30 29.0 0.2% S Henderson St, e/o Renton Ave S E 30 28.7 0.1% S Myrtle St, w/o Beacon Wr Ave S W 30 32.8 0.6% S Myrtle St, w/o Beacon Wr Ave S E 30 31.0 0.2% Stone Way N, s/o N 45th St S 30 25.2 0.0% Stone Way N, s/o N 45th St N 30 23.3 0.0% SW 106th St, w/o Seola Beach Dr SW E 30 38.3 8.2% SW 106th St, w/o Seola Beach Dr SW W 30 36.3 4.1% SW Holden St, w/o Delridge Way SW W 30 34.2 1.6% SW Holden St, w/o Delridge Way SW E 30 34.0 1.5% SW Spokane Br, w/o SW Spokane E St W 30 44.6 35.3% SW Spokane Br, w/o SW Spokane E St E 30 41.3 19.3% Valley St, w/o Fairview Ave N E 30 30.8 1.4% Valley St, w/o Fairview Ave N W 30 29.6 0.7% W Emerson Pl, se/o 21st Ave W SE 30 35.4 3.1%
46 | SEATTLE DEPARTMENT OF TRANSPORTATION 85th High End Speed Percentile Speeder Location Direction Limit speed Percentage W Emerson Pl, se/o 21st Ave W NW 30 34.5 1.7% West Marginal Way SW, nw/o Highland Park Way SW SE 40 49.0 11.3% West Marginal Way SW, nw/o Highland Park Way SW NW 40 47.8 7.6% Western Ave, nw/o Lenora St NW 25 29.4 3.1% Westlake Ave N, s/o Highland Dr N 30 35.4 3.3% Westlake Ave N, s/o Highland Dr S 30 31.8 0.7%
2018 TRAFFIC REPORT | 47 HISTORICAL COLLISION DATA
Historical Data Year Statewide Collisions Seattle Collisions Police Reported Citizen Reported 2006 122,172 15,784 15,625 159 2007 118,829 15,065 14,971 94 2008 110,494 14,139 14,037 102 2009 103,008 13,272 12,101 1,171 2010 101,887 11,948 11,288 660 2011 98,881 12,405 11,240 1,165 2012 99,560 12,725 10,614 2,111 2013 99,689 12,736 10,310 2,426 2014 107,634 12,034 10,815 2,425 2015 117,053 14,244 10,930 3,314 2016 122,384 13,641 11,603 2,038 2017 121,068 12,469 10,959 1,516
Fatal/Serious Collisions Year Fatal Serious Injury Total Serious Fatal 2006 33 293 326 2007 14 245 259 2008 20 193 213 2009 24 200 224 2010 18 177 195 2011 10 140 150 2012 19 177 196 2013 22 156 178 2014 17 169 186 2015 21 143 164 2016 20 171 191 2017 19 168 187
48 | SEATTLE DEPARTMENT OF TRANSPORTATION Bicycle Collisions Total Possible/ Fatal Fatal and Serious Year Collisions Evident Injury Serious Injury Collisions Injury Collisions 2005 293 223 46 0 46 2006 365 280 52 2 54 2007 356 263 45 1 46 2008 365 280 54 2 56 2009 383 297 59 4 63 2010 364 292 48 1 49 2011 362 295 41 2 43 2012 387 319 28 1 29 2013 421 340 54 2 56 2014 380 316 21 1 22 2015 483 404 25 1 26 2016 439 352 26 2 28 2017 403 324 19 2 21
Pedestrian Collisions Total Possible/ Fatal Fatal and Serious Year Collisions Evident Injury Serious Injury Collisions Injury Collisions 2005 477 424 46 7 53 2006 567 510 48 9 57 2007 487 445 37 5 42 2008 470 418 43 9 52 2009 454 398 45 11 56 2010 496 448 43 5 48 2011 393 355 36 2 38 2012 469 417 44 8 52 2013 396 339 48 9 57 2014 473 360 52 6 58 2015 522 412 46 7 53 2016 553 428 61 5 66 2017 537 396 62 11 73
2018 TRAFFIC REPORT | 49 2017 ALL COLLISIONS
2017 COLLISION SEVERITY Fatality Collision 0% Serious Injury Collision 1%
Unknown 11% Injury Collision 28%
Property Damage Only Collision 60%
2017 Total Collision by State Collision Type Count All other non-collision 4 Property Damage 1 Domestic animal other (cat, dog, etc) 1 Entering at angle 2,215 Fire started in vehicle 1 Fixed object 842 From Opposite Direction 866 From Same Direction 3,820 Parked Car 1,990 Other object 16 Pedestrian 501 Train 15 Bicycle 359 Vehicle overturned 36 Not Stated 1,808 Grand Total 12,475
50 | SEATTLE DEPARTMENT OF TRANSPORTATION Contributing Circumstances for All 2017 Collisions Serious Property Fatality Injury Injury Damage Only Collision Collision Collision Collision Total Apparently Asleep 1 12 20 33 Apparently Fatigued 3 9 12 Apparently Ill 1 7 7 15 Did not Grant Right of Way to Pedestrian 8 143 15 166 Did not Grant Right of Way to Vehicle 2 15 408 674 1,099 Disregard Flagger/Officer 1 4 5 Disregard Stop and Go Light 1 9 114 105 229 Disregard Stop Sign/Flashing Red 1 60 83 144 Disregard Yield Sign/Flashing Yellow 9 9 18 Driver Adjusting Audio or 1 1 2 Entertainment System Driver Distractions Outiside Vehicle 11 16 27 Driver Eating or Drinking 1 1 2 Driver Interacting with passengers, 3 10 13 Animals, or Objects Inside Vehicle Driver Not Distracted 13 311 554 878 Driver Operating Handheld 1 11 12 24 Telecommunications Device Driver Operating Hands-free Wireless 1 1 2 Telecommunications Device Driver Operating Other Electronic 2 6 8 Devices (computers, navigational, etc.) Driver Smoking 2 1 3 Exceeding Reasonable and Safe Speed 4 86 131 221 Exceeding Stated Speed Limit 3 4 14 25 46 Failing To Signal 1 4 5 Failure to Use Xwalk 1 6 12 19 Following Too Closely 7 181 263 451 Had Taken Medication 2 2 Headlight Violation 1 2 1 4 Improper Backing 1 8 140 149 Improper Parking Location 1 12 13 Improper Passing 3 30 77 110 Improper Signal 1 9 10 Improper Turn 1 6 86 199 292 Improper U-Turn 3 24 38 65
2018 TRAFFIC REPORT | 51 Contributing Circumstances for All 2017 Collisions Serious Property Fatality Injury Injury Damage Only Collision Collision Collision Collision Total Inattention 1 21 578 1,159 1759 None 12 110 2,360 4,407 6,889 On Wrong Side OF Road 9 12 21 Operating Defective Equipment 2 25 46 73 Other 7 28 327 1,201 1,563 Other Driver Distractions Inside Vehicle 1 8 16 25 Over Center Line 1 10 24 35 Under the Influence of Alcohol 1 10 132 231 374 Under the Influence of Drugs 3 7 27 37 Unknown Driver Distraction 7 19 227 773 1,026
2017 Fatalities Location Collision Date Collision Type Wallingford Ave and N 82nd St 1/1/2017 Pedestrian 1St Ave and Columbia St 1/5/2017 Pedestrian S Graham St Between 33Rd Ave S and M L King Jr Wr Way S 1/13/2017 Cycles Roosevelt Way NE and NE 65th St 1/26/2017 Pedestrian Aurora Ave N Between N 104th St and N Northgate Way 2/2/2017 Pedestrian 20th Ave NE and NE 65th St 2/4/2017 Pedestrian Alaskan Way Viaduct NB Between S Royal Brougham Way on Rp 3/11/2017 Motorcycle and Seneca St Off Rp Holman Rd NW Between 7th Ave NW and 6th Ave NW 3/13/2017 Vehicle Lenora St and Western Ave 4/25/2017 Pedestrian Renton Ave S Between 54th Ave S and 55th Ave S 7/10/2017 Pedestrian 1St Ave S and S Fidalgo St 8/4/2017 Motorcycle S Alaska St Between S Columbian Way and S Alaska Pl 8/26/2017 Motorcycle Blanchard St and Westlake Ave 10/12/2017 Pedestrian 15th Emerson Rp and W Emerson St 11/6/2017 Vehicle 1St Ave S and S Andover St 11/21/2017 Cycles Rainier Ave S Between 51st Ave S and Sturtevant Ave S 12/3/2017 Pedestrian 8th Ave NW and NW 92nd St 12/6/2017 Vehicle Alaskan Way S and S Atlantic St 12/7/2017 Pedestrian 34th Ave S and S Charlestown St 12/14/2017 Pedestrian
52 | SEATTLE DEPARTMENT OF TRANSPORTATION 2018 TRAFFIC REPORT | 53 2017 PEDESTRIAN COLLISIONS
2017 PEDESTRIAN COLLISION LOCATIONS
Alley 0%
Mid-Block 25%
Intersection 75%
Collision Location Count Alley 2 Block 133 Intersection 402 Total 537
Pedestrian - Involved Collision Rate per Million Inhabitants Pedestrian Seattle Pedestrian Collisions Pedestrian Collisions Year Collisions Population Per Capita Per 100,000 2005 477 573,296 0.000832 83 2006 567 580,485 0.000977 98 2007 487 589,304 0.000826 83 2008 470 598,541 0.000785 79 2009 455 602,000 0.000756 76 2010 508 608,660 0.000835 83 2011 401 620,778 0.000646 65 2012 486 634,535 0.000766 77 2013 413 652,000 0.000633 63 2014 496 668,342 0.000742 74 2015 522 684,451 0.000763 76 2016 553 704,352 0.000785 79 2017 537 713,700 0.000752 75
54 | SEATTLE DEPARTMENT OF TRANSPORTATION Injury Class of Pedestrians Involved in 2017 Collisions by Facility Type Fatality Serious Injury Injury Property Damage Facility Collision Collision Collision Only Collision Total Designated Bike Route 1 1 Marked Cross Walk 4 25 190 25 244 Other 2 11 2 15 Roadway 4 17 50 13 84 Shoulder 1 2 3 Sidewalk 12 13 1 26 Unmarked Crosswalk 1 4 36 5 46 Walkway 2 4 1 7
Injury Class of Pedestrians Involved in Collisions in 2017 Fatality Serious Injury Injury Property Damage Age Collision Collision Collision Only Collision Total 14 and Under 10 5 15 15 - 24 8 47 8 63 25 - 34 3 14 79 8 104 35 - 44 2 10 49 5 66 45 - 54 2 10 41 6 59 55 - 64 1 9 37 3 50 65 and Over 3 9 25 2 39
2018 TRAFFIC REPORT | 55 FACILITY THE PEDESTRIAN WAS USING FOR 2017 COLLISIONS 0% Designated Bike Route
2% 11%
1% 4% Marked Crosswalk Not Stated Other Roadway Shoulder 19% Sidewalk 60% Unmarked Crosswalk Walkway 2%
1%
GENDER OF PEDESTRIANS IN 2017 COLLISIONS
7% Not Stated
50% Female 43% Male
56 | SEATTLE DEPARTMENT OF TRANSPORTATION 2017 PEDESTRIAN COLLISION SEVERITY BY HOUR OF THE DAY 45 Unknown 40 Property Damage Only 35 Injury
30 Serious Injury Fatality 25
20
15
10
5
0 2 AM 3 AM 4 AM 5 AM 6 AM 7 AM 8 AM 9 AM 1 PM 2 PM 3 PM 4 PM 5 PM 6 PM 7 PM 8 PM 9 PM 1 AM 11 PM 12 AM 10 AM 11 AM 12 PM 10 PM
2018 TRAFFIC REPORT | 57 Pedestrian Collision Severity by Hour of Day in 2017 Fatality Serious Injury Injury Property Damage Hour Collision Collision Collision Only Collision Unknown Total 12 AM 1 1 13 3 8 26 1 AM 1 2 6 2 11 2 AM 1 1 1 3 4 AM 1 1 5 AM 1 3 4 6 AM 3 15 1 19 7 AM 1 5 27 4 37 8 AM 3 19 5 27 9 AM 1 5 18 1 25 10 AM 6 16 2 24 11 AM 1 16 17 12 PM 3 30 3 36 1 PM 4 25 5 34 2 PM 5 22 1 28 3 PM 2 3 31 4 40 4 PM 2 5 18 4 29 5 PM 3 28 5 36 6 PM 1 3 36 1 41 7 PM 25 3 28 8 PM 1 2 10 4 17 9 PM 4 13 4 21 10 PM 2 15 7 24 11 PM 1 8 9 Total 11 62 396 60 8 537
58 | SEATTLE DEPARTMENT OF TRANSPORTATION 2017 PEDESTRIAN COLLISION SEVERITY BY DAY OF WEEK 120 Unknown Serious Injury 100 Property Damage Only 80 Injury Fatality 60
40
20
0 Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Pedestrian Collision Severity by Day of Week in 2017 Fatality Property Damage Serious Injury Day of Week Collision Injury Collision Only Collision Collision Unknown Total Sunday 2 37 2 5 1 47 Monday 1 59 8 6 74 Tuesday 1 54 7 13 75 Wednesday 75 15 10 1 101 Thursday 6 63 9 15 4 97 Friday 66 14 7 2 89 Saturday 1 42 5 6 54 Total 11 396 60 62 8 537
2018 TRAFFIC REPORT | 59 2017 PEDESTRIAN COLLISION SEVERITY BY MONTH 80 Unknown 70 Property Damage Only
60 Injury Serious Injury 50 Fatality 40
30
20
10
0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Pedestrian Collision Severity by Month in 2017 Fatality Serious Injury Injury Property Damage Month Collision Collision Collision Only Collision Unknown Total January 3 5 32 6 1 47 February 2 2 51 3 58 March 6 38 8 52 April 1 5 17 2 1 26 May 4 25 10 39 June 4 25 4 33 July 1 9 27 2 1 40 August 2 23 5 1 31 September 3 26 4 33 October 1 4 36 5 3 49 November 10 47 4 61 December 3 8 49 7 1 68 Total 11 62 396 60 8 537
60 | SEATTLE DEPARTMENT OF TRANSPORTATION Vehicle Actions in Pedestrian Collisions in 2017 Fatality Serious Injury Injury Collision Collision Collision Total Vehicle backing hits pedestrian 2 10 12 Vehicle going straight hits pedestrian 7 41 135 183 Vehicle hits Pedestrian - All Other Actions 2 2 4 Vehicle turning left hits pedestrian 2 9 144 155 Vehicle turning right hits pedestrian 2 6 59 67
Injury Class of Pedestrians Involved in 2017 Collisions by Weather Fatality Serious Injury Injury Property Damage Weather Condition Collision Collision Collision Only Collision Total Clear or Partly Cloudy 6 36 224 39 305 Fog/Smog/Smoke 3 1 4 Other 2 2 Overcast 2 13 45 3 63 Raining 3 11 100 12 126 Snowing 2 1 3 Unknown 1 9 1 11 Unknown 1 9 1 11
2018 TRAFFIC REPORT | 61 2017 Pedestrian Collisions by Light Conditions Fatality Serious Injury Injury Property Damage Collision Collision Collision Only Collision Total Dark - No Street Lights 2 1 3 Dark - Street Lights Off 1 4 5 Dark - Street Lights On 5 19 119 20 163 Dawn 1 6 10 2 19 Daylight 5 34 233 29 301 Dusk 1 11 4 16 Unknown 6 1 7
2017 Pedestrian Collisions by Road Condition Fatality Serious Injury Injury Property Damage Collision Collision Collision Only Collision Total Dry 8 43 246 38 335 Ice 1 1 Snow/Slush 1 1 2 Unknown 1 11 1 13 Wet 3 17 126 17 163 Wet 3 17 125 17 163
62 | SEATTLE DEPARTMENT OF TRANSPORTATION 2017 BICYCLE COLLISIONS 2017 BICYCLE COLLISION LOCATIONS
Intersection Mid-block 60% 40%
Contributing Circumstance for Cyclists in 2017 Bicycle Collisions Non-Serious Contributing Serious Possible Injury (Evident Circumstance Fatal Injury Injury Injury) No Injury Unknown Total Not Stated 2 4 6 1 13 Did not Grant Right of 1 10 3 1 1 16 Way to Vehicle Disregard Stop and Go 1 1 2 4 Light Disregard Stop Sign/ 4 1 5 Flashing Red Disregard Yield Sign/ 1 1 Flashing Yellow Driver Distractions 1 1 Outside Vehicle Driver Not Distracted 7 8 3 1 19 Exceeding Reasonable 2 2 and Safe Speed Following Too Closely 2 2 Headlight Violation 1 1 Improper Passing 1 2 1 1 5 Improper Turn 1 1 2 Inattention 2 4 4 2 12 None 5 47 72 10 1 135 On Wrong Side OF Road 3 3 Operating Defective 2 1 3 Equipment Other 6 7 1 14 Unknown Driver 1 4 1 1 7 Distraction
2018 TRAFFIC REPORT | 63 GENDER IDENTITY OF CYCLISTS INVOLVED IN 2017 COLLISIONS
None Noted 5% Female 21%
Male 74%
Gender of Cyclists Involved in 2017 Collisions Serious Possible Non-Serious Injury Gender Fatality Injury Injury (Evident Injury) No Injury Unknown Total Not Noted 1 6 6 13 Male 2 6 72 82 15 3 180 Female 4 16 26 6 52
64 | SEATTLE DEPARTMENT OF TRANSPORTATION 2018 TRAFFIC REPORT | 65 CYCLIST INJURY SEVERITY IN 2017 COLLISIONS Unknown 1% Serious Injury 4% Fatal 1%
No Injury 9%
Possible Injury 38% Non-Serious Injury (Evident Injury) 47%
66 | SEATTLE DEPARTMENT OF TRANSPORTATION Age of Cyclists Involved in 2017 Collisions Serious Possible Non-Serious Injury Age Fatality Injury Injury (Evident Injury) No Injury Unknown Total 13 and Under 2 6 1 9 17 - 24 4 9 19 3 35 25 - 34 2 25 38 6 2 73 35 - 44 1 1 21 21 3 47 45 - 54 2 17 12 4 35 55 - 64 1 1 12 6 2 22 65 - Over 2 5 1 8 Not Stated 1 6 7 1 1 16
AGE OF CYCLISTS INVOLVED IN 2017 COLLISIONS 14 Unknown No Injury 12 Non Serious Injury (Evident Injury) 10 Possible Injury Serious Injury 8 Fatality
6
4
2
0 5 7 11 14 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 54 56 58 60 62 64 67 70
2018 TRAFFIC REPORT | 67 Bicycle Collisions by Month in 2017 Fatality Serious Injury Injury Property Damage Month Collision Collision Collision Only Collision Unknown Total Jan 1 1 16 2 1 21 Feb 1 11 1 13 Mar 2 19 1 22 Apr 18 3 21 May 1 40 7 1 49 Jun 1 36 3 40 Jul 7 48 10 65 Aug 3 43 1 1 48 Sep 1 32 10 2 45 Oct 2 34 5 2 43 Nov 1 16 1 1 19 Dec 14 2 16 Total 2 19 327 46 9 402
2017 BICYCLE COLLISIONS BY MONTH 70 Unknown 60 Property Damage Only Injury 50 Serious Injury
40 Fatality
30
20
10
0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
68 | SEATTLE DEPARTMENT OF TRANSPORTATION Bike Collision Severity by Hour of Day in 2017 Fatality Serious Injury Injury Property Damage Hour Collision Collision Collision Only Collision Unknown Total 12 AM 7 4 8 19 4 AM 1 1 5 AM 1 1 1 3 6 AM 2 13 2 17 7 AM 1 20 1 22 8 AM 42 2 44 9 AM 1 18 1 20 10 AM 12 3 15 11 AM 2 9 1 12 12 PM 12 3 15 1 PM 2 15 17 2 PM 2 15 1 18 3 PM 2 22 2 26 4 PM 2 27 9 38 5 PM 1 42 4 47 6 PM 3 25 3 31 7 PM 18 4 22 8 PM 12 4 16 9 PM 1 5 1 7 10 PM 7 7 11 PM 4 4 10 PM 1 1 5 3 10 11 PM 5 5 Total 2 20 337 45 8 416
2018 TRAFFIC REPORT | 69 2017 BIKE COLLISION SEVERITY BY HOUR OF THE DAY 50 Unknown 45 Property Damage Only 40 Injury 35 30 Serious Injury 25 Fatality 20 15 10 5 0 1 AM 3 AM 4 AM 5 AM 6 AM 7 AM 8 AM 9 AM 1 PM 2 PM 3 PM 4 PM 5 PM 6 PM 7 PM 8 PM 9 PM 12 AM 10 AM 11 AM 12 PM 10 PM 11 PM
70 | SEATTLE DEPARTMENT OF TRANSPORTATION Bike Collision Severity of the Day in 2017 Fatality Serious Injury Injury Property Damage Only Day Collision Collision Collision Collision Unknown Total Sunday 3 26 4 33 Monday 1 41 8 1 51 Tuesday 1 4 61 6 72 Wednesday 4 64 8 4 80 Thursday 3 60 7 1 71 Friday 1 4 51 8 2 66 Saturday 24 5 29 Total 2 19 327 46 8 402
BIKE COLLISION SEVERITY BY DAY 2017 90 Unknown 80 Property Damage Only 70 Injury 60 Serious Injury 50 Fatality 40 30 20 10 0 Sun Mon Tues Wed Thurs Fri Sat
2018 TRAFFIC REPORT | 71 2017 Injury Class of Cyclists by Facility Type Serious Possible Non-Serious Injury Facility Type Fatality Injury Injury (Evident Injury) No Injury Unknown Total Not Stated 2 2 Designated Bike 4 28 44 7 2 85 Route Marked Cross 1 18 12 4 35 Walk Other 4 4 Roadway 2 5 34 43 9 1 94 Shoulder 5 5 10 Sidewalk 1 7 5 13 Unmarked 1 1 2 Crosswalk
FACILITY TYPE FOR CYCLISTS INVOLVED IN 2017 COLLISIONS
1%
5% 4% Designated Bike Route Marked Crosswalk 35% Other Roadway Shoulder 14% Sidewalk Unmarked Crosswalk Walkway 14%
2%
72 | SEATTLE DEPARTMENT OF TRANSPORTATION Injury Class of Cyclists in 2017 Collisions by Weather Fatality Serious Injury Injury Property Damage Weather Collision Collision Collision Only Collision Unknown Total Not Stated 3 4 8 15 Clear or Partly 1 18 261 34 314 Cloudy Fog/Smog/Smoke 1 1 Other 1 1 Overcast 1 29 3 33 Raining 1 28 4 33 Unknown 4 1 5
Clothing Visibility for Cyclists Involved in 2016 Collisions by Facility Type Serious Possible Non-Serious Injury Clothing Fatality Injury Injury (Evident Injury) No Injury Unknown Total Dark 2 12 16 6 36 Light 1 16 19 1 37 Mixed 2 7 54 67 12 3 145 Other Reflective 5 7 12 Apparel - Shoes, Patches Retro - Reflective 5 4 9 Retro - Reflective 5 5 1 11
2018 TRAFFIC REPORT | 73 74 | SEATTLE DEPARTMENT OF TRANSPORTATION GLOSSARY
TRAFFIC VOLUME TERMS Serious Injury: Any injury that results in at least Source – William R. McShane and Roger P. Roess, a temporary impairment, e.g. a broken limb. It Traffic Engineering (Englewood Cliffs, New Jersey: does not mean that the collision resulted in a Prentice Hall, 1990) 49. permanent disability.
ADT: Average Daily Traffic. An average 24-hour Fatality: This category includes persons who traffic volume at a given location for some period died at the scene of the collisions, were dead on less than a year. arrival at the hospital, or died within 30 days of the collision from collision-related injuries. AWDT: Average Weekday Daily Traffic. An average 24-hour traffic volume occurring on weekdays for ROADWAY CLASSIFICATION TYPES Source – City some period of time less than one year, such as of Seattle Comprehensive Plan, Section 3.4 and for a month or a season. SDOT
AADT: Average Annual Daily Traffic. The average Residential (Non-Arterial) Streets: Roadways 24-hour traffic volume at a given location over a that provide localized traffic circulation, including full 365-day year. access to neighborhood land uses, commercial and industrial land uses, and access to higher INJURY TYPES level traffic streets. Source – State of Washington Police Traffic Collision Report Instruction Manual and SDOT Collector Arterials: Roadways that collect and distribute traffic from principal and minor No Injury: Applies when the officer at the scene arterials to local access streets or provide direct has no reason to believe that, at the time of the access to destinations. collision, the person received any bodily harm due to the collision. Minor Arterials: Roadways that distribute traffic from principal arterials to collector arterials and Possible Injury: Any injury reported to the officer access streets. or claimed by the individual such as momentary unconsciousness, claim of injuries not evident, Principal Arterials: Roadways that are intended limping, complaint of pain, nausea, hysteria, etc. to serve as the primary routes for moving traffic These are counted as injuries when the total through the city, connecting urban centers and number of injuries is presented. urban villages to one another, or to the regional transportation network. Non Serious Injury (Evident Injury): Any injury other than fatal or disabling at the scene, including broken fingers or toes, abrasions, etc.
2018 TRAFFIC REPORT | 75 This report is prepared in compliance with Seattle Municipal Code 11.16.220, which requires the City Traffic Engineer to present an annual traffic report that includes information about traffic trends and traffic collisions on City of Seattle streets. Beyond this legal requirement, the report strives to serve as an accessible reference of Seattle traffic data and trends for all.
In gathering and compiling the information in this report, the Seattle Department of Transportation does not waive the limitations on this information’s discoverability or admissibility under 23 U.S.C § 409.
For additional information about traffic data and collisions on Seattle streets, readers may contact the City Traffic Engineer Dongho Chang at [email protected] or visit http://data.seattle.gov.
The Seattle Department of Transportation 700 5th Avenue, Suite 3800 PO Box 34996 Seattle, WA 98124-4996 (206) 684-ROAD (7623) www.seattle.gov/transportation www.seattle.gov/visionzero 12.2018