I-405 Sepulveda Pass Improvements Project Community Advisory Committee November 10, 2010
1 Click to edit Master title style
• Click to edit Master text styles – Second level Skirball Bridge and Ramps• Third level –Fourth level » Fifth level
2 SkirballClick Bridge to edit and MasterRamps title style
Alternative ramp/bridge• Click designsto edit considered Master text styles • Keep Skirball ramp location as is – Second level • Shift Skirball Bridge north or south of its current location • Third level • Create a “single-point interchange” on Skirball Bridge –Fourth level • Create “split diamond” southbound ramps »at Fifth level Mulholland Bridge • Relocate southbound ramps south of current Skirball Bridge
3 SkirballClick Bridge to edit and Master Ramps title style
Based on CAC• feedback Click toand edit engineering Master review, text two styles alternatives remain – Second level Alt 1 Keep Skirball ramp location as is • Third level Alt 2 Relocate southbound ramps south of–Fourth current level Skirball Bridge » Fifth level
4 SkirballClick Bridge to edit and Master Ramps title style
EvaluationEvaluation Process Process
5 SkirballClick Bridge to edit and Master Ramps title style
Tonight’s Agenda• Click to edit Master text styles 1. Description of alternatives – Second level 2. HNTB study methodology • Third level 3. HNTB study results –Fourth level • Level of service comparison » Fifth level • Intersection capacity comparison • Travel time comparison 4. Project design benefits 5. Q&A
6 Click to edit Master title style
• Click to edit Master text styles Skirball Bridge and Ramps– Second level • Third level Traffic Analysis –Fourth level » Fifth level
7 Traffic Analysis
Alternative 1: Southbound Skirball ramps remain in their current location in a diamond-ramp configuration • Assumes improvements to Mulholland Bridge and Skirball Center Dr
8 Traffic Analysis
Animation 1
9 Traffic Analysis
Alternative 2: Southbound Skirball ramps relocated approximately 2,000 feet south of their current location in a hook-ramp configuration • Assumes improvements to Mulholland Bridge, Skirball Center Dr and Sepulveda Bl
10 Traffic Analysis
Animation 2
11 Traffic Analysis
12 Traffic Analysis
HNTB Traffic Analysis Methodology • Thursday, April 29, 2010 • Typical weather (no rain) • Schools in session • UCLA in session • Observations made during AM and PM Peak Hour • Gathered before major construction began
13 Traffic Analysis
HNTB Traffic Analysis Methodology (Contd.)
Observation Date Conducted (2010) Periods Observed (AM) Periods Observed (PM) Traffic Count Thursday, April 29 7:00-10:00 3:00-6:00 Pedestrian Count Thursday, July 1 5:30-8:30 Queue Length Tuesday, September 21 7:00-8:30 Bus/Truck Count Tuesday, October 5 7:30-8:30 3:00-4:00
14 Traffic Analysis
• The total amount of time saved by morning peak hour (7am to 8am)commuters in the Skirball/Mulholland system, due to the relocation of the SB ramps, is over 16,000 hours annually. • The total amount of time saved by evening peak hour (4pm to 5pm) commuters in the Skirball/Mulholland system, due to the relocation of the SB ramps, is over 2,100 hours annually.
15 Traffic Analysis Click to edit Master title style
Level of Service (LOS)• Click and Reduced to edit Delay Master text styles Morning Peak Hour (Secs) Evening– Second Peak Hour (Secs)level Intersection Alt 1 Alt 2 Reduction 1 Alt 2Alt Reduction Skirball/Mulholland CE 34 BB • Third0 level Skirball/NB Ramps D C 18 B –FourthB 0 level Skirball/SB Ramps BE 49 BD » Fifth26 level Skirball/Sepulveda B B 0 C C 6
16 Traffic Analysis Results
Local Street Network Throughput—Mulholland-Skirball Area
Vehicles per Hour
Increase Alt 1 Alt 2 Increase (%) AM 4,884 5,190 306 6.3 PM 2,987 3,216 229 7.7
17 Travel Times—An Overview
Symbols found on the following maps:
POIs shown on the following maps are: Travel Times—An Overview
Symbols found on the following maps:
POIs shown on the following maps are:
TheSepulvedaMulhollandSkirball Mirman Cultural TunnelBlvdDr School Center and CasianoMountaingate Rd Dr Travel Times—An Overview
Symbols found on the following maps:
Origins are shown as red nodes.
Destinations are shown as green nodes. Travel Times—An Overview
Symbols found on the following maps:
An “N”indicates an access point on northbound I-405.
An “S”indicates an access point on southbound I-405. Travel Times—An Overview
Symbols found on the following maps:
Travel routes are from origins to destinations. Travel Times—An Overview
Symbols found on the following maps:
Travel occurring on I-405 is shown as a black line. Travel Times—An Overview
Symbols found on the following maps:
In some cases, travel Red color indicates the start of the travel route. routes begin and end Green color indicates the end of the travel route. at local POIs. Travel Times—An Overview
Symbols found on the following maps:
In others, travel routes begin on the freeway and end at a local POI. Travel Times—An Overview
Symbols found on the following maps: Travel Times—An Overview
Symbols found on the following maps:
Relocate ramps and signalized intersection Travel Times—An Overview
Symbols found on the following maps:
Uniform cycle length for more efficient coordination Traffic Analysis
29 Traffic Analysis
30 Traffic Analysis
31 Traffic Analysis
32 Traffic Analysis
33 Traffic Analysis
34 Traffic Analysis
35 Traffic Analysis
36 Traffic Analysis
37 Traffic Analysis
38 Traffic Analysis
39 Traffic Analysis
40 Traffic Analysis
41 Traffic Analysis
42 Traffic Analysis
43 Traffic Analysis
44 Traffic Analysis
AM Peak Hour
Travel Time Total Yearly Delay Reductions Vehicles Reductions To/From (Min/Sec) with Alt 2 Affected (Hr) Casiano Rd to SB on-ramp 5m 59s 357 8,534.35 Mirman School to NB on-ramp 1m 46s 119 843.14 Mirman School to SB on-ramp 3m 24s 357 4,851.43 Sepulveda Tunnel to Mirman School 13s 43 35.61 Sepulveda Tunnel to Mountain Gate Dr -5s 1,359 -448.45 Sepulveda Tunnel to SB on-ramp -26s 102 -181.31 NB off-ramp to Mirman School 44s 69 207.63 SB off-ramp to Mirman School -1m 29s 35 -206.56
45 Traffic Analysis
PM Peak Hour
Travel Time Total Reductions (Min/Sec) Vehicles Yearly Delay To/From with Alt 2 Affected Reductions (Hr) Casiano Rd to SB on-ramp 1m 41s 161 1,083.90 Mountain Gate Dr to Sepulveda Tunnel -19s 591 -757.55 Mountain Gate Dr to NB on-ramp 16s 143 149.17 Skirball Center to NB on-ramp 24s 9 14.40 Skirball Center to SB on-ramp 2m 6s 5 42.00 NB off-ramp to Casiano Rd -5s 66 -22.35 NB off-ramp to Mirman School -6s 135 -48.35 NB off-ramp to Sepulveda Tunnel 1m 2s 5 20.60
46 Traffic Analysis
• The total amount of time saved by morning peak hour (7am to 8am)commuters in the Skirball/Mulholland system, due to the relocation of the SB ramps, is over 16,000 hours annually. • The total amount of time saved by evening peak hour (4pm to 5pm) commuters in the Skirball/Mulholland system, due to the relocation of the SB ramps, is over 2,100 hours annually.
47 Traffic Analysis Click to edit Master title style
Level of Service (LOS)• Click and Reduced to edit Delay Master text styles Morning Peak Hour (Secs) Evening– Second Peak Hour (Secs)level Intersection Alt 1 Alt 2 Reduction 1 Alt 2Alt Reduction Skirball/Mulholland CE 34 BB • Third0 level Skirball/NB Ramps D C 18 B –FourthB 0 level Skirball/SB Ramps BE 49 BD » Fifth26 level Skirball/Sepulveda B B 0 C C 6
48 Traffic Analysis Results
Local Street Network Throughput—Mulholland-Skirball Area
Vehicles per Hour
Increase Alt 1 Alt 2 Increase (%) AM 4,884 5,190 306 6.3 PM 2,987 3,216 229 7.7
49 Click to edit Master title style
• Click to edit Master text styles – Second level Project Design Benefits• Third level –Fourth level » Fifth level
50 ProjectClick Design to edit Benefits Master title style • Moving the ramps to the proposed location will reduce the cycle length at the• Skirball/Sepul Click to editveda Master intersection text by 60-90styles seconds – Second level • Reducing the cycle length at Skirball/Sepulveda •would Third reduce level average wait times at other Sepulveda intersections,–Fourth including: level • Mountain Gate Dr » Fifth level • Bel Air Crest Rd • Herscher Wy • Bergreen Pl
51 ProjectClick Design to edit Benefits Master title style
• Traffic Lane• Added Click to Skirballto edit Center Master Dr east text of I-405styles • Sidewalk added to west side of Skirball Center Dr from new Mulholland bridge to Skirball bridge– Second level • Third level • Sidewalk added to north side of Skirball Bridge –Fourth level • Skirball Bridge shoulders—more space for bicyclists» Fifth level
52 ProjectClick Design to edit Benefits Master (Contd.) title style
• New signage •directs Click visitors to edit to Skirball Master Cultural text Center styles • Relocated southbound ramps include a dedicated northbound right-turn lane between new– ramps Second and levelSkirball Bridge • Third level • Bicycle lanes will be added to Sepulveda Bl–Fourth between Skirball level Bridge and new southbound ramps » Fifth level • New southbound hook ramps will provide greater ramp storage capacity
53 ProjectClick Design to edit Benefits Master title style
• Dedicated right-turn lane from northbound Sepulveda Bl onto new southbound• Click I-405 on-rampto edit eliminates Master conflicttext styles with through traffic – Second level • Dedicated double left-turn lane moves traffic• from Third level southbound Sepulveda Bl onto southbound–Fourth I-405 more level quickly » Fifth level • Safer Sepulveda/Skirball intersection includes wider lanes and fewer conflicting movements
54 Thirty-Day Construction Look Ahead
55 Wilshire Segment
Top 5 Upcoming Activities • Ohio Av utility relocation, bridge demo and widening • Santa Monica bridge demo, ramp construction • Wall construction along NB 405, from Ohio to Constitution • Beloit Av widening, sound wall demo and reconstruction • SB I-405 at Wilshire abutment forming and bridge work
56 Wilshire Segment
Work Projected Location Activity Closures/Notes Hours Date Wilshire Build MSE wall D/N On-going Blvd loops, Pouring and forming abutments Night December W of 405 Replacing on-ramp WB Wilshire to SB I-405 on-ramp Night January 2011 closed 14 days Wilshire UC Set girders and false work Temporary full closure of Wilshire Bl Night November
57 Wilshire Segment
Work Projected Location Activity Closures/Notes Hours Date Walls 1672/1686, North of Build MSE Lane reductions on Sepulveda Bl, D/N On-going Wilshire, East of I-405 retaining/sound wall NB 405
Wall 1685, N of Build MSE Lane reductions on Sepulveda Bl, Night On-going Constitution, West of I-405 retaining/sound wall Bike path will be closed with detour
58 Wilshire Segment
Work Projected Location Activity Closures/Notes Hours Date
Santa Monica Bl Build retaining/sound wall Temp night closures of ramps, 405 D/N Nov/Dec
Widen bridge Temp night closures of ramps, 405 D/N Nov/Dec
Ramp wall construction Temp night closures of ramps, 405 D/N November Relocate multiple utilities Temp closures of Ohio Av Day Nov/Dec Ohio Ave Demolish barrier Temp closures of Ohio Av and 405 Night Dec Widen bridge, drive pile Lane reduction on Ohio Av Day Jan 2011
59 Wilshire Segment
Work Projected Location Activity Closures/Notes Hours Date Beloit Av, Demo outer portions of sound wall Night December Santa Monica to Olympic Bl Drill shafts, build new MSE sound wall Day Jan 2011
Demo existing sound wall D/N April 2011 E. Dowlen Dr Jack and bore pit Closure of E. Dowlen until D/N On-going (VA property) late Aug
60 Wilshire Segment
Proposed Wilshire Ramps
Proposed off-ramp Proposed on-ramp
I-405 FWY
61 Sunset Segment (WaterfordClick to Sepulveda) to edit Master title style
Top 5 Upcoming •Activities Click to edit Master text styles • Sunset Bridge footing construction – Second level • Reopening of Sunset/Church intersection • Third level • Montana undercrossing demolition –Fourth level • Walls 1720/1730 (Sepulveda/Homedale) construction » Fifth level • Overhead power undergrounding
62 Sunset Segment Click to edit Master title style Work Location Activity Closures/Notes Hours Projected Date Sepulveda Clear and grub (vegetation• Click TBD: to Maintain edit one Master lane in Day/Night text November/Decemberstyles between removal) each direction of traffic Cashmere & – Second level Church/Ovada
Sepulveda Utility relocation: Sewer line TBD; Maintain one lane in Day/Night• Third November/December level between (2), water line & fire hydrant each direction of traffic Montana and on Bronwood, fiber optic line. –Fourth level Sunset » Fifth level Sepulveda – DWP pulling underground Homedale and Bronwood Days / Mid-September to Homedale/ wires periodically Nights December Bronwood Walls Clear and grub (vegetation Maintain one lane in each Day Ongoing 1720/1730 removal) and build access direction of traffic Drill pile TBD; Maintain one lane in Day October 22 – ongoing each direction of traffic
63 Sunset Segment Click to edit Master title style
Work Location Activity Closures/Notes Hours Projected Date Walls Retaining wall • ClickTBD; Maintain to oneedit lane inMaster each Day text November/styles 1720/1730 construction - direction of traffic December (continued) permanent tie backs – Second level Lateral walls and TBD; Maintain one lane in each Day November/ soundwall construction direction of traffic • ThirdDecember level Sunset on Temporary Exxon Mobil Nightly closures of Sunset Bl – NB on Day/Night–Fourth Completed level ramp and oil line relocation ramp; 36-hour single directional Sepulveda Bl traffic lane on Sepulveda Bl to » Fifth level connect line-in under Sunset Bridge Sunset Demolition of Lane closures Night Completed Bridge abutments, 4 nights
Reconstruction Equipment deliveries with night Day/Night On going intermittent closures of Sunset Bl and I-405; Abutment foundation pile driving 10 64 Sunset Segment Click to edit Master title style
Location Activity Closures/Notes Work Hours Projected Date Wall 1746 Utility relocation:• ClickTime TBD; to maintain edit one laneMaster in Day/Night text styles November Warner, sewer line each direction of traffic
Wall construction TBD; maintain one lane in Day/Night– Second November/ level each direction of traffic • ThirdDecember level Thurston Circle New gas line installation Maintain access to Day as much as Completed residents possible–Fourth level Montana Bridge Demolition associated TBD; maintain one lane in Day/Night» Fifth November level 12 & 13 with widening of bridge each direction of traffic Temporary storm drain TBD: maintain one lane in Night Mid-November relocation each direction of traffic
65 Sunset Bridge Replacement Work Click to edit Master title style
• Click to edit Master text stylesN – Second level • Third level –Fourth level I-405 Freeway » Fifth level
Wall 1746
66 SunsetClick Segment—Proposed to edit Master Landscapingtitle style Location Sepulveda Bl Jurisdiction Landscape Type Wilshire to Westside • ClickState to edit MasterYes textVines styles Constitution Eastside VA No changes– SecondNo changes level Constitution Westside City of L.A. Yes Vines to Montana Eastside City of L.A. No changes •No Third changes level Montana off ramp State Yes –FourthVines, trees, level shrubs Montana to Westside City of L.A. Yes »Vines Fifth level Sunset Eastside (Montana City of L.A. To be Dependent on utility to Bronwood) determined redesign Eastside City of L.A. Yes Trees (Bronwood to Sepulveda Way)
67 Landscape Adjustments Click to edit Master title style
•Vines • West side of Sepulveda,• Click fromto edit Wilshire Master to Church/Ovada text styles • I-405 Project will plant vines and provide irrigation– Second level • Sidewalk trees • East side of Sepulveda, from Montana to Sunset• Third level • I-405 Project will work with City and utility owners–Fourth to level determine if it is possible to adjust spacing and location» Fifth oflevel underground utilities to allow for tree planting. • Proposed tree spacing on sidewalk is being determined.
68 Final EIR/EIS Compliance Click to edit Master title style
Tree Replacement• Click to Formulas edit Master text styles Non-natives Naturally Occurring– Natives Second level State ROW 1:1 (ratio) 5:1 (ratio) • Third level City of L.A. 250 (total) 400 (total) –Fourth level » Fifth level
15 69 Final EIR/EIS Compliance Click to edit Master title style
Tree replacement requirements • Available space • Click to edit Master text styles • No subsurface utility conflicts – Second level • Coordination between Caltrans District Landscape and Architect District Biologist • Third level • At the discretion of the agency holding jurisdiction–Fourth level Caltrans – state ROW » Fifth level City of L.A. – city ROW
16 70 Final EIR/EIS Compliance Click to edit Master title style
Tree replacement locations 1. In area where original• Click tree wasto edit Master text styles removed – Second level 2. In project area 3. Santa Monica Mountains • Third level Conservancy –Fourth level 4. City of Los Angeles Bureau of » Fifth level Street Services
17 71 Tree Replacement Click to edit Master title style
• Number of trees removed (all areas) – approx. 1,850-1,900• Click to edit Master text styles
• Number of trees replanted (all areas) – Second level – approx. 3,650-4,000 • Third level • Number of trees replanted in project –Fourth level area – approx. 1,450 » Fifth level • Number of trees replanted in Westwood Hills area (Constitution to Moraga) – approx. 75
18 18 Mulholland Segment (Sepulveda to Ventura)
Top 5 Upcoming Activities • Early prep work for the sound wall in Sherman Oaks • Construction of retaining walls near Getty Trail Head • Skirball Bridge reconstruction • Early prep work for the relocated southbound Skirball on-ramp construction • Redesign of Mulholland Bridge
73 Mulholland Segment
Work Projected Area Activity Closures/Notes Hours Date Getty Trail Head Crusher site Continuing crusher site operation at the Day/ On-going operation Getty Trail Head Night Retaining Building of two retaining walls along the Day/ Ongoing walls northbound freeway. No resident within Night construction impacted perimeter. NB between Retaining wall Will begin construction of additional Day/ Mid Getty Trail Head construction retaining walls near the Bel Air Crest Night December & Skirball Bridge community
74 Mulholland Segment
Work Projected Start Area Activity Closures/Notes Hours Date Sherman Clearing and Closure of two right-hand lanes on the SB Day/ Ongoing until Oaks grubbing I-405 and Valley Vista on-ramp Night October (west of Area grading and Construction trucks in/out via mainline; Day/ Ongoing until I-405) construction of only small vehicles use residential streets. Night October 2011 retaining wall Closures of southbound Skirball ramps.
75 Mulholland Segment
Project Work ed Area Activity Closures/Notes Hours Date Valley Utility relocation Will need to relocate two utilities to Day TBD Vista support sound wall construction. Project team is working to minimize impact to community. House The work zone will get set-up behind Day TBD demolition behind temporary fencing. Clear and grub Access to the work zone area will Day/ TBD entail access from street and freeway. Night Sound wall Access to the work zone area will Day/ TBD construction entail access from street and freeway. Night
76 Mulholland Segment
Work Projected Area Activity Closures/Notes Hours Date Skirball Bridge demolition Demolished the span over the north side of Night Completed Bridge the bridge in three nights. Demolition of abutment and center column will occur later in about a month. Reconstruction Will reconstruct north side of the bridge. Day Day/ Ongoing and time work. Most work will be conducted Night until May, behind k-rail. Some night time closures of the 2011 ramps and bridge. Relocated Will begin early prep work and clearing and Day/ Early southbound Skirball grubbing related to the construction of Night December on-ramp retaining walls and relocated southbound construction Skirball on-ramp.
77 For More Information
Project Hotline: (213) 922-3665 [email protected] www.metro.net/405 www.facebook.com/405project Twitter: http://twitter.com/I_405 Nixle: nixle.com
78