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Home My WebLink About2013-05-06; Traffic Safety Commission; ; Investigate the need to establish an ALL-WAY STOP at the intersection of Edinburgh Drive and Glasgow Drive per the direction of City CouncilCITY OF CARLSBAD TRAFFIC SAFETY COMMISSION STAFF REPORT COMMISSION MEETING OF: May 6, 2013 ITEM NO. 6A LOCATION: Intersection of Edinburgh Drive and Glasgow Drive INITIATED BY: Greg and Jill Agosti 4730 Edinburgh Drive Carlsbad, CA 92010 REQUESTED ACTION: Investigate the need to establish an ALL-WAY STOP at the intersection of Edinburgh Drive and Glasgow Drive per the direction of City Council. BACKGROUND: DATA: The subject intersection serves the adjacent residential neighborhoods in the north portion of the city (see Exhibit 1). Due to existing safety concerns and the future traffic increase from the proposed Robertson Ranch West Village development, residents have requested that an ALL-WAY STOP be considered for the intersection of Edinburgh Drive and Glasgow Drive. On December 12, 2012, City Council considered adoption of Master Plan Amendment, MP02-03(C) for the Robertson Ranch West Village Master Plan. During public comment, Ms. Jill Agosti requested assistance from the city to install an ALL-WAY STOP at the intersection of Glasgow Drive and Edinburgh Drive. The City Attorney recommended to the City Council that this request be addressed by the Traffic Safety Commission rather than by City Council as a mitigation measure for the Robertson Ranch West Village project. City Council approved the Master Plan Amendment with the provision that the developer would fund any future STOP signs at the intersection of Glasgow Drive and Edinburgh Drive, if determined appropriate by the City Council after consideration and recommendation by the Traffic Safety Commission. Edinburgh Drive and Glasgow Drive are unclassified in the Circulation Element of the General Plan, but function as local collector streets. Both streets are fully improved and feature curb and gutter, sidewalk and street lights on both sides of the street. Both streets have a curb-to-curb width of 40 feet with a single travel lane in each direction and are unpainted. On-street parking is allowed on both sides of Edinburgh Drive and Glasgow Drive. At the subject intersection, Glasgow Drive is STOP-controlled while Edinburgh Drive is uncontrolled. Edinburgh Drive is uncontrolled along its approximately 2,000 foot length except at its terminus at Tamarack Avenue, which is STOP-controlled. Glasgow Drive has a traffic signal at Carlsbad Village Drive and an ALL-WAY STOP at Middleton Drive. Page 1 COMMISSION MEETING OF: (continued) CITY OF CARLSBAD TRAFFIC SAFETY COMMISSION STAFF REPORT May 6, 2013 ITEM NO. 6A As part of this request, staff conducted an analysis to establish an ALL-WAY STOP at the subject intersection. The analysis is based on Section 2B.07 of the California Manual on Uniform Traffic Control Devices (MUTCD) which specifies the consideration of minimum traffic volumes, accident history, vehicle/pedestrian conflicts, sight distance restrictions and other criteria to determine whether or not an ALL-WAY STOP is justified at a particular location. A 24-hour approach count was conducted on August 3, 2011, the results of which are shown on Table 1. Table 1: 24-Hour Traffic Count Summary at Edinburgh Drive and Glasgow Drive Edinbur2h Drive Glau:ow Drive Total Time Eastbound Westbound Subtotal Northbound Southbound Subtotal Volume 0000-0100 7 1 8 0 6 6 14 0100-0200 5 2 7 0 2 2 9 0200-0300 6 1 7 1 4 5 12 0300-0400 0 2 2 1 1 2 4 0400-0500 0 2 2 1 1 2 4 0500-0600 3 10 13 0 8 8 21 0600-0700 8 23 31 3 28 31 62 0700-0800 31 31 62 4 49 53 115 0800-0900 33 42 75 11 41 52 127 0900-1000 34 35 69 12 39 51 120 1000-1100 33 20 53 9 42 51 104 1100-1200 33 28 61 15 37 52 113 1200-1300 48 40 88 9 51 60 148 1300-1400 33 23 56 9 36 45 101 1400-1500 34 26 60 13 40 53 113 1500-1600 49 25 74 15 42 57 131 1600-1700 67 21 88 17 58 75 163 1700-1800 59 24 83 9 59 68 151 1800-1900 73 22 95 6 30 36 131 1900-2000 61 15 76 8 57 65 141 2000-2100 40 15 55 7 37 44 99 2100-2200 26 12 38 3 28 31 69 2200-2300 22 7 29 9 23 32 61 2300-2400 13 16 29 6 7 13 42 Totals 718 443 1161 168 726 894 2055 There have been no reported collisions at the subject intersection over the past three years. The intersection of Edinburgh Drive and Glasgow Drive did not meet the California MUTCD criteria based on minimum traffic volumes or collision history. Staff conducted field measurements of the existing sight distance conditions at the subject intersection. It is standard engineering practice to evaluate intersection sight distance from the STOP-controlled approaches, in this case being Glasgow Drive. The posted speed limit on Edinburgh Drive is 25 miles per hour and the corresponding minimum stopping sight distance for 25 miles per hour is 150 feet. The results of the sight distance evaluation conducted by staff are shown in Table 2. Page 2 COMMISSION MEETING OF: (continued) CITY OF CARLSBAD TRAFFIC SAFETY COMMISSION STAFF REPORT May 6, 2013 ITEM NO. GA Table 2: Sight Distance Evaluation from Glasgow Drive at Edinburgh Drive Measured MinlmumSSD Meets 25 Location Sie:ht Distance for 25 MPH MPHSSD? N/B Glas.ow, lookin• East 194' 150' Yes N/B Glaseow, lookine West 300' 150' Yes S/B Glase:ow1 lookine: East 380' 150' Yes 5/B Glasgow, looking West 300' 150' Yes Based on these measurements, sight distance at the subject intersection was found to be acceptable. However, Section 2B.07 of the California MUTCD allows consideration of an ALL-WAY STOP at "an intersection of two residential neighborhood collector (through) streets of similar design and operating characteristics where multiway stop control would imprave traffic operational characteristics of the intersection." Based on the residential neighborhood collector street characteristics of Glasgow Drive and Edinburgh Drive, staff believes that this consideration is applicable and that an ALL-WAY STOP at the intersection of Glasgow Drive and Edinburgh Drive would improve the operational characteristics of the intersection. RECOMMENDATION: Based on the findings contained in this report, the Traffic Safety Coordinating Committee recommends the installation of an ALL-WAY STOP at the intersection of Glasgow Drive and Edinburgh Drive. NECESSARY CITY COUNCIL ACTION: The City Council must adopt an ordinance to establish the stop control as recommended. Page 3 LOCATION MAP @ NOT TO SCALE LEGEND: @ EXISTING TRAFFIC SIGNAL @ EXISTING ALL-WAY STOP I j ~ I i ~ -1 .. i5 t,-...------------------------------.....----1! EXHIBIT .6 PROPOSED ALL-WAY STOP GLASGOW DRIVE & EDINBURGH DRIVE 1 i ! ----------------------------------/j