The URL can be used to link to this page

Home My WebLink About2007/12/18 Item 1 CITY COUNCIL AGENDA STATEMENT ~\~ em OF .~~CHULA VISTA 12/18/07, ItemL SUBMITTED BY: ORDINANCE ESTABLISHING THE SPEED LIMIT ON BONITA ROAD BETWEEN BONITA GLEN DRNE AND I-80S SOUTHBOUND RAMPS AT 35 l'v1PH ~ DIRECTOR OF EN G AND GENERAL SERVICES ~ tJ CITY MANAGER ~) ASSISTANT CITY AGER "'? r- 4/5THS VOTE: YES 0 NO [8J ITEM TITLE: REVIEWED BY: BACKGROUND Based on provisions of the California Vehicle Code, pursuant to authority under the Chula Vista Municipal Code, and at the direction of the City Engineer, Traffic Engineering Staff performed an Engineering Speed Survey along Bonita Road between Bonita Glen Drive and I-80S Southbound Ramps after determining no such study had ever been completed for this segment of road. Based on the results of this survey, the establishment of a 35mph speed limit is recommended. ENVIRONMENTAL REVIEW The Environmental Review Coordinator has reviewed the proposed project for compliance with the California Environmental Quality Act (CEQA) and has determined that the project qualifies for a Class I categorical exemption pursuant to Section 153301 (c) (Existing Facilities) of the State CEQA Guidelines because the streets are existing facilities. Thus, no further environmental review is necessary. RECOMMENDATION Council adopt an ordinance establishing a 35mph speed limit on Bonita Road between Bonita Glen Drive and I-80S Southbound Ramps. BOARDS/COMMISSION RECOMMENDATION The Safety Commission, at their meeting of September 13, 2007, voted 4-0 with three Commissioners absent, to concur with staffs recommendation to establish the speed limit on Bonita Road between Bonita Glen Drive and the I-80S Southbound Ramps at 35 mph. DISCUSSION In accordance with the California Vehicle Code, the posting of speed limits must be supported by an Engineering and Traffic Survey which shall include: (I) prevailing speeds as determined by 1-1 12/18/07, ItemL Page 2 of 3 traffic engineering measurements; (2) accident records; and (3) traffic/roadside conditions not readily apparent to the driver. The Manual on Uniform Traffic Control Devices (2003 MUTCD~ states that speed limits should be established at the nearest (5mph) increment to the 85' percentile speed (which is defined as that speed at or below which 85 percent of the traffic is moving) unless engineering judgment recommends otherwise based on roadway characteristics. Speed limits higher than the 85th percentile speed are not generally considered reasonable and safe. Limits below the 85'h percentile do not facilitate the orderly movement of traffic. Speed limits established on this basis conform to the consensus of those who drive the street as to what speed is reasonable and safe, and are not dependent on the judgment of one or a few individuals. Only when roadside development results in traffic conflicts or unusual conditions, which are not readily apparent to drivers, speed limits may be posted below the 85'h percentile speed. Physical Conditions: The following table shows the existing conditions for Bonita Road: Segment Limits Bonita Glen Drive to 1-805 SIB Ramps Length/Width 0.11 mi. /82'-94'curb to curb Classification Six Lane Prime ADT (Year) 34,549 (2007) Exist. Speed Limit Not posted 85'''% Speed 36 mph Number of Lanes 2 lanes westbound and 3 lanes eastbound near the SB ramps Striping 2 lanes & 3 lanes with a right turn pocket onto the SB ramp On-Street Parking Not allowed. Land Use Business Horizontal Alignment Tangent Vertical Alignment G 1 - +0.4% to G2 - +0.93%, grade break over centerline Design speed (geometric): 70 mph Accident Rate: Segment 1.68/2.16 (per million vehicle miles) / State Businesses with direct driveway access. Adj acent to 1-805 Special Conditions southbound ramps and bike lanes and bus routes along both directions CONCLUSION Following MUTCD guidelines, with an 85% speed of 36 mph, the speed limit should be posted 35 mph. This speed limit is further supported by the fact that speed limits on Bonita Road to either side of this segment are 35 mph. Staff therefore recommends the establishment of a 35 mph speed limit based on the low accident rate, design speed, 85'h percentile speed as outlined in the EngineeringlTraffic Survey, and roadway characteristics. Staff also recommends that Schedule X ofthe register maintained in the office of the City Engineer be revised as follows: 1-2 12/18/07, ItemL Page 3 00 10.48.020 Schedule X - Established Speed Limits in Certain Zones-- Designated Name of Street Beginning At Ending At Speed Limit Bonita Road Bonita Glen .. Drive I-80S Southbound 35 mph Ramps DECISION MAKER CONFLICT Staff has reviewed the property holdings of the City Council and has found no property holdings within 500 feet of the boundaries of the property which is the subject of this action. FISCAL IMPACT The cost to install signs and pavement legends is approximately $400.00, which will be funded through the Public Works operating budget. ATTACHMENTS 1. Location Map 2. Engineering & Traffic Survey Prepared by: Hasib Baha, Associate Civil Engineer, Engineering and General Services 1-3 i"'r'\j " 0." O~ ~ '.':,'oii_, ,~ ~. . C o *..... ' I o <.) o -I ~ ~' ~~ ~~~lfJ,*,~>. ~ <J ~ ~.;::s ~l O::::l :I:: U A 11 ACHMENT _ SPEED LIMIT - ENGINEERING/TRAFFIC SURVEY p STREET: Bonita Road LIMITS: Bonita Glen Drive - 1-805 SIB Ramp Length of Segment (ft): 603' (0.11 miles) Existing Posted Limit (lnph): Not Posted SUMMARY OF SPEED SURVEYS Segment: Bonita Glen Drive - 1805 SIB Ramp Date Taken: 6/7/2007 No. of Vehicles on Sample (cars): 100 85th Percentile (mph): 36 Range of Speeds Recorded (mph): 19 - 42 ROADWAY CHARACTERISTICS Width (ft): 82'-94' curb to curb with a 4'-15' raised median Total No. of Lanes: 5 total lanes (2 westbound and eastbound lanes; 3 eastbound lanes at the 1-805 southbound ramps) Horizontal Alignment: Tangent Vertical Alignment: Less then 2% grade change TRAFFIC CHARACTERISTICS Average Daily Traffic: 34,549 (2007) On-Street Parking: Not allowed Special Conditions: Solid businesses with direct driveway access. Adjacent to 1-805 southbound ramps and bike lanes and bus routes along both directions. Accident History: The accident rate at this segment is 1.68 (accidents per million vehicle miles) which is lower than the rate of2.16 for similar roadways in the State of California. SURVEY RESULTS Study was Prepared by: Erica Mancilla Date: 7/2/2007 Recommendation: Retain 35mph speed limit due to the 85th percentile speed, roadway and traffic characteristics. Date Recommendation Approved: . '1 Ie:, iczoo 7 By: JlInNe on, P.E. d/It.-- Approved Speed Limit (mph): 35 mph (/ Per evc 40803, Survey Expires: 6/7/2014 1-5 ORDINANCE NO. ORDINANCE OF THE CITY OF CHULA VISTA ESTABLISHING THE SPEED LIMIT ON BONITA ROAD BETWEEN BONITA GLEN DRIVE AND I-80S SOUTHBOUND RAMPS AT 35 MPH WHEREAS, based on the provisions of the California Vehicle Code and pursuant to authority under the Chula Vista Municipal Code, the City Engineer has determined that the speed limit on Bonita Road between Bonita Glen Drive and I-80S Southbound ramps to be 35 mph; and WHEREAS, the prevailing speeds, accident history, roadway design characteristics and land use justify a 35 mph posted speed limit; and WHEREAS, the Engineering and Traffic Survey was prepared pursuant to all provisions of the California Vehicle Code and the Manual on Uniform Traffic Control Devices; and WHEREAS, the Safety Commission concurs with staffs recommendation to establish the speed limit on Bonita Road between Bonita Glen Drive and I-80S Southbound ramps at 35 mph; and WHEREAS, this recommendation and other information in the City Engineer's report has been fully considered by the City Council. NOW, THEREFORE, the City Council of the City of Chula Vista ordains as follows: SECTION I: That the speed limit on Bonita Road between Bonita Glen Drive and I-80S Southbound ramps is established at 35 mph. SECTION II: That Schedule X of a Register of Schedules maintained by the City Engineer as provided in Section 10.48.020 of the Chula Vista Municipal Code, "Established Speed Limits in Certain Zones-Designated," is amended to include the following information: Chula Vista Municipal Code Section 10.48.020 - Schedule X Established Sneed Limits in Certain Zones Name of Street Beginning At Ending At Speed Limit Bonita Road Bonita Glen Drive I-80S Southbound 35 mph Ramos H:\Atlomey\Final Rcsos\2007\12 18 07\#1_0rdinancc_(Bonita Road) Speed Est.doc 1-6 Ordinance No. Page 2 SECTION III: This ordinance shall take effect and be in full force on the thirtieth day from and after its adoption. Presented by Approved as to form by Jack Griffin Director of Engineering and General Services H;\ENGINEERIOrdinances\Ord2007\12-18-07\Ordinancc_(Bonita Road) Speed Est.doc 1-7