SAN DIEGO COUNTY TRAFFIC ADVISORY COMMITTEE April 23, 2021 ~ 9:00 AM 5510 Overland Ave, Room 271 San Diego CA, 92123 MINUTES I. Call to Order / Roll Call II. Pledge of Allegiance III. Approval of Minutes IV. Items for Review AREA/ SUBJECT LOCATION PLANNING/SPONSOR GROUP SUPERVISORIAL DISTRICT 1 1-A. RADAR CORRAL CANYON ROAD BONITA/ CERTIFICATION CENTRAL AV TO CHULA VISTA CITY LIMIT SWEETWATER CSG SUPERVISORIAL DISTRICT 2 2-A. RADAR TAVERN ROAD ALPINE/ CERTIFICATION VICTORIA PARK TR TO ARNOLD WY ALPINE CPG 2-B. RADAR TAVERN ROAD ALPINE/ CERTIFICATION ARNOLD WY TO SOUTH GRADE RD ALPINE CPG 2-C. BRIDGE 764 N. GLEN OAKS DR ALPINE/ WEIGHT LIMITS ALPINE CPG SUPERVIORIAL DISTRICT 5 5-A. RADAR ALVARADO STREET FALLBROOK/ CERTIFICATION VINE ST TO STAGE COACH LN FALLBROOK CPG 5-B. RADAR ALVARADO STREET FALLBROOK/ CERTIFICATION STAGE COACH LN TO LIVE OAK PARK RD FALLBROOK CPG 5-C. RADAR FALLBROOK STREET FALLBROOK/ CERTIFICATION MAIN AV TO STAGE COACH LN FALLBROOK CPG 5-D. RADAR EL CAMINO REAL RANCHO SANTA FE/ CERTIFICATION LA ORILLA TO LINEA DEL CIELO SAN DIEGUITO CPG 5-E. RADAR EL CAMINO REAL RANCHO SANTA FE/ CERTIFICATION LINEA DEL CIELO TO SAN DIEGO CITY LIMIT SAN DIEGUITO CPG 5-F. BRIDGE MESA GRANDE ROAD SAN YSABEL/ WEIGHT LIMITS 295’ NORTH OF STATE ROUTE 79 N/A SAN DIEGO COUNTY TRAFFIC ADVISORY COMMITTEE COMMITTEE REPORT OF: April 23, 2021 Item 1-A SUPERVISORIAL DISTRICT: 1 SUBJECT: Radar Certification LOCATION: Corral Canyon Road from Central Avenue to the Chula Vista city limit (near Country Vistas Lane) (a distance of 1.19 miles) BONITA (Thos. Bros. 1311-A1) INITIATED BY: DPW Traffic Engineering REQUEST: Radar Certification PROBLEM AS STATED BY REQUESTER: Corral Canyon Road from Central Avenue to the Chula Vista city limit (near Country Vistas Lane) is posted 35 MPH Radar Enforced. Preliminary review of prevailing speeds and roadway conditions could support radar certification of the existing 35 MPH speed limit. Existing Traffic Devices Corral Canyon Road is a striped two-lane divided through highway with a 33 foot travelled way on a 64 foot road bed. The roadway is striped with a two way left turn lane and bike lanes. There are three all way stops along this roadway segment. Corral Canyon Road has several traffic calming measures including oval median islands, speed advisory chicane, median channelization, and transverse rumble strips. The roadway is also posted with horse advisory signs, with trails crossing the roadway at a number of locations. Corral Canyon Road is classified as a Minor Collector on the County General Plan Mobility Element Network. The roadway is posted 35 MPH/Radar Enforced. Average Daily Traffic Volumes 10/20 08/13 Corral Canyon Road: 100’ N/o Jockey Way 5,309 6,720 300’ S/o Steeple Chase Road 4,888 6,220 85th 10 MPH % in Speed Data Percentile Pace Pace Corral Canyon Road: At Jockey Way (2021) 38.0 MPH 30-39 80.0% 100’ N/o Yearling Court (2013) 39.0 MPH 30-39 78.0% 300’ S/o Steeple Chase Rd (2021) 35.7 MPH 28-37 79.0% (2013) 39.0 MPH 30-39 70.0% Speed Zone (2021) 36.9 MPH 29-38 79.5% Corral Canyon Road 2 Item 1-A Collision Data There have been 6 reported collisions along this segment of roadway, 3 of which involved injury, in a 3 year period (12-01-2017 to 11-30-2020). These collisions result in a segment accident rate of 0.90 collisions per million vehicle miles. The statewide average is 1.60 collisions per million vehicle miles for similar suburban conventional 2 lanes or less with speeds less than 45 MPH. Discussion This item is a periodic review to certify the existing posted speed limit for radar enforcement that is required every seven years to comply with state law and was requested by DPW staff. The TAC recommends reducing the existing 35 MPH speed limit to 30 MPH and certifying the 30 MPH speed limit for radar enforcement on Corral Canyon Road from Central Avenue to the Chula Vista city limit (near Country Vistas Lane) in the unincorporated community of Bonita. The subject segment of Corral Canyon Road is a striped two-lane divided suburban Minor Collector roadway with bike lanes and a two-way left turn lane throughout. The roadway has several traffic calming features and provides direct access to residential driveways throughout the segment. In establishing radar enforceable speed limits, state law requires rounding measured 85th percentile speeds to the nearest 5 MPH increment. The law also allows an additional 5 MPH reduction based on roadway conditions such as collision history, or alternatively allows rounding measured speeds down to the lower 5 MPH increment. The results of the recent speed survey produced an overall speed zone of 36.9 MPH which supports a 35 MPH speed limit. The County Traffic Engineer noted as a condition not readily apparent to motorists that there is significant equestrian and pedestrian presence along this roadway. He also noted the high collision severity rate (3 out of 6 collisions resulting in an injury) along the roadway. Based on these conditions, the Committee supported reducing the existing 35 MPH speed limit to 30 MPH and certifying the 30 MPH speed limit for radar enforcement. Radar speed enforcement has proven to be an effective tool against excessive speeding and has had a positive effect in reducing the speed of motorists on roadways where radar enforcement takes place. Corral Canyon Road meets the California Highway Patrol (CHP) criteria for radar speed enforcement. The Sweetwater Community Planning Group was provided the opportunity to review this item and did not provide input. Recommendation The TAC recommends reducing the existing 35 MPH speed limit to 30 MPH and certifying the 30 MPH speed limit for radar enforcement on Corral Canyon Road from Central Avenue to the Chula Vista city limit (near Country Vistas Lane) in the unincorporated community of Bonita. Corral Canyon Road 3 Item 1-A Motion: Bartley Second: Coady Vote: yes-13, no-0, abstain-0, vacant-0, absent-2 Necessary Board Action Amend Ordinance Section 72.173. of the San Diego County Regulatory Code. SAN DIEGO COUNTY TRAFFIC ADVISORY COMMITTEE COMMITTEE REPORT OF: April 23, 2021 Item 2-A SUPERVISORIAL DISTRICT: 2 SUBJECT: Radar Certification LOCATION: Tavern Road from Victoria Park Terrace to Arnold Way (a distance of 0.57 miles) ALPINE (Thos. Bros. 1233- J1) INITIATED BY: DPW Traffic Engineering REQUEST: Radar Certification PROBLEM AS STATED BY REQUESTER: Tavern Road from Victoria Park Terrace to Arnold Way is posted 35 MPH Radar Enforced. Preliminary review of prevailing speeds and roadway conditions could support radar certification of the existing 35 MPH speed limit. Existing Traffic Devices Tavern Road is a striped two and four lane divided through highway with a 24 to 60 foot travelled way on a 36 to 82 foot road bed. The roadway is striped with a two way left turn lane, bike lanes, white edgeline, and parking lane. There are three signalized intersections along this roadway segment. The roadway is also posted with fire station advisory signs with supplemental flashing beacons, signal advisory signs with supplemental flashing beacons, and a speed advisory turn. Tavern Road is classified as a Major Road on the County General Plan Mobility Element Network. The roadway is posted 35 MPH/Radar Enforced. Average Daily Traffic Volumes 10/20 08/13 Tavern Road: 100’ N/o I-8 Westbound Ramp 7,046 4,350 150’ N/o Arnold Way 11,377 12,220 85th 10 MPH % in Speed Data Percentile Pace Pace Tavern Road: 100’ S/o Victoria Park Tr (2021) 36.9 MPH 28-37 72.0% (2013) 40.0 MPH 30-39 66.0% 700’ S/o Alpine Boulevard (2021) 40.4 MPH 31-40 78.0% (2013) 39.7 MPH 31-40 76.0% Speed Zone (2021) 38.7 MPH 30-39 75.0% Tavern Road 2 Item 2-A Collision Data There have been 25 reported collisions along this segment of roadway, 12 of which involved injury, in a 3 year period (12-01-2017 to 11-30-2020). These collisions result in a segment accident rate of 4.36 collisions per million vehicle miles. The statewide average is 1.60 collisions per million vehicle miles for similar suburban conventional 2 lanes or less with speeds less than 45 MPH. Discussion This item is a periodic review to certify the existing posted speed limit for radar enforcement that is required every seven years to comply with state law and was requested by DPW staff. The TAC recommends certifying the existing 35 MPH speed limit for radar speed enforcement on Tavern Road from Victoria Park Terrace to Arnold Way in the unincorporated community of Alpine. The subject segment of Tavern Road is a striped two-lane divided suburban Major Road with bike lanes and a two-way left turn lane. The roadway provides access to some commercial driveways and a fire station as well as provides access to the Alpine community north of the I-8 freeway. In establishing radar enforceable speed limits, state law requires rounding measured 85th percentile speeds to the nearest 5 MPH increment. The law also allows an additional 5 MPH reduction based on roadway conditions such as collision history, or alternatively allows rounding measured speeds down to the lower 5 MPH increment. The results of the recent speed survey produced an overall speed zone of 38.7 MPH which supports a 35 MPH speed limit. The Committee supported certifying the existing 35 MPH speed limit for radar enforcement.