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Home My WebLink About13 ADOPT RESOLUTION NO 10-81• Agenda Item 13 6 AGENDA REPORT Reviewed: City Manager Finance Direct MEETING DATE: SEPTEMBER 21, 2010 TO: WILLIAM A. HUSTON, CITY MANAGER FROM: DOUGLAS S. STACK, DIRECTOR OF PUBLIC WORKS/CITY ENGINEER SUBJECT: ADOPT RESOLUTION NO. 10-81 DESIGNATING A FOUR-WAY STOP CONTROL ON PARK AVENUE AT THE WESTERLY COSTCO/GAS STATION DRIVEWAYS SUMMARY A traffic study has been prepared which analyzed the need for the installation of a four-way stop control on Park Avenue at the westerly Costco/Gas Station driveways. The study concluded that a four-way stop control is warranted and its installation should reduce the potential for vehicular accidents and eliminate the issue of restricted sight distance at this location. RECOMMENDATION It is recommended that the City Council adopt Resolution No. 10-81 designating a four-way stop control on Park Avenue at the westerly Costco/Gas Station driveways. FISCAL IMPACT Sufficient funds have been budgeted and appropriated in this Fiscal Year 2010-2011 Public Works Department Operating Budget to install the recommended action. DISCUSSION/BACKGROUND On Park Avenue between Tustin Ranch Road and Warner Avenue there are currently three all -way stop intersections at commercial driveways and one traffic signal at District Drive (see attached aerial photograph). These traffic control devices were installed under the original development plan for The District at Tustin Legacy. As traffic has increased within The District, various traffic collisions have occurred at the intersection of Park Avenue and the westerly Costco/Gas Station driveways. The intersection experienced four accidents in 2009 and has experienced an additional three accidents in 2010 that were determined to be correctible. Due to the increase in accidents, a traffic study was prepared to determine what, if any, traffic control measures should be implemented to improve traffic conditions at this location. The traffic study looked at traffic volumes, specifics of the traffic accidents, intersection geometry, and general traffic operation. The traffic study also included extensive field review of the intersection and adjacent area along Park Avenue. Based on vehicle counts taken at the intersection for the traffic study, there is a disproportionate volume of traffic at the driveways compared to Park Avenue. With traffic on Park Avenue being substantially greater than the driveways, delays experienced by driveway traffic are frequent. These delays contribute to frustrated drivers forcing their way into the stream of Park Avenue traffic. There is also a sight distance concern for vehicles entering Park Avenue from the westerly Costco Store driveway due Four -Way Stop Control on Park Avenue September 21, 2010 Page 2 to the curvature of the road. These factors contribute to an increasing number of accidents at the intersection. Due to the volumes of traffic entering the intersection and the number of reported traffic collisions per year, standard warrants for a four-way stop have been exceeded. Based on the traffic study and field observations, it was determined that the installation of a four-way stop control would substantially reduce the potential for vehicular accidents, mitigate the limited visibility issues, and provide gaps in traffic to facilitate street crossings. Therefore, it is recommended that four-way stop control be installed at the intersection of Park Avenue and the westerly Costco/Gas Station driveways. S. Stack, P.E. of Public Works/City Engineer Attachments: Resolution No. 10-81 Aerial photograph Traffic Study Dana R. Kasdan, P.E. Engineering Services Manager S:\City Council Items\2010 Council Items\Approval 4 -way stop Park Avenue—Res # 10-81_dss.docx RESOLUTION NO. 10-81 A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF TUSTIN, CALIFORNIA DESIGNATING THE LOCATION OF CERTAIN STOP CONTROL INTERSECTIONS WHEREAS, Section 5323 of the Tustin City Code provides for the designation of stop intersections by resolution of the City Council upon the making of certain findings; and WHEREAS, the City Council of the City of Tustin hereby finds and determines that the placement of stop signs at the intersection listed below is necessary to facilitate the flow of traffic and provide for the assignment of vehicular right-of-way; and WHEREAS, said findings are made subsequent to receipt of a traffic engineering report summarizing traffic survey data relative to said intersection; NOW, THEREFORE, BE IT RESOLVED by the City Council of Tustin that the intersection set forth below is hereby designated as a four-way stop controlled intersection and the City Engineer is hereby directed to place and maintain stop signs at all entrances to said intersection as herein specified, and that Resolution 10-81 shall take effect upon placement of said signs. INTERSECTION Park Avenue at westerly Costco/Gas Station driveways PASSED AND ADOPTED at a regular meeting of the City Council of the City of Tustin held on the 21 st day of September 2010 Jerry Amante, Mayor ATTEST: Pamela Stoker, City Clerk STATE OF CALIFORNIA ) COUNTY OF ORANGE ) SS CITY OF TUSTIN ) I, Pamela Stoker, City Clerk and ex -officio Clerk of the City Council of the City of Tustin, California, do hereby certify that the whole number of the members of the City Council is five; that the above and foregoing Resolution No. 10-81 was duly and regularly passed and adopted at a regular meeting of the City Council held on the day of 2010 by the following vote: COUNCILMEMBER AYES: COUNCILMEMBER NOES: COUNCILMEMBER ABSTAINED: COUNCILMEMBER ABSENT: PAMELA STOKER, City Clerk S:\City Council Items\2010 Council Items\Attachments - Agreements, Resolutions & Ordinances, etc\Resolution 10-81 Four -Way Stop on Park Ave.docx U Z U • V J � LL Q LL Z t ) \ Y a N o � Q • j �J 4D 7 �1 �i A US T/N-FDUS T A SSOC/A TES, /NC. iRAFF/C ENG/NEER/NG AND TRANSPORTAT/ON PLANNING MEMORANDUM TO: Terry Lutz, City of Tustin FROM: Joe Foust, P.E. DATE: May 3, 2010 SUBJECT: FOUR-WAY STOP CONTROL — PARK AVENUE AND WESTERLY COSTCO/GAS STATION DRIVEWAYS Austin -Foust Associates, Inc. (AFA) has investigated the traffic flow on Park Avenue at the Lowes and westerly Costco/Gas Station driveways. The Lowes driveway is four-way stop controlled and the westerly Costco driveways (which serve both the main store as well as the gas station situated on the opposite side of Park Avenue) are two-way stop controlled with the driveways yielding to the through traffic movements on Park Avenue. The Lowes and westerly Costco driveways are only about 600 feet apart. An aerial site plan is illustrated in Figure 1. ANALYSIS The regular four-way stop warrant specifies a minimum volume of 300 vehicles per hour entering the intersection from the main street and 200 (including pedestrians and bicycles) from the side street for at least eight hours per day. Although the westerly Costco/Gas Station Driveways average just about 193 vph (183 vph plus 10± pedestrian/bikes) for eight hours (slightly less than the suggested 200 vph), Park Avenue averages 1,150 vph (considerably more than the suggested 300 vph). This results in a combined average total of 1,333 vph for eight hours, which far exceeds the combined 500 vph minimum intersection volume specified for a four-way stop warrant. The intersection experienced four correctible accidents in the calendar year 2009. This is one accident shy of also satisfying the accident history warrant of five correctible accidents per year for a four-way stop. In addition, the intersection traffic also surpasses the minimum volume requirement for a signal warrant and, in so doing, thereby also satisfies a four-way stop warrant. These facts present a compelling case for installation of a four-way stop control at this location. The traffic signal warrant calculation sheets are included in the Appendix. 016030mm.doc 2223 Wellington Avenue, Suite 300 • Santa Ana, California 92701-3161 Tel: (714) 667-0496 Fax: (714) 667-7952 www.austinfoust.com Terry Lutz, City of Tustin May 3, 2010 Page 3 A field review of the intersection was conducted. This review disclosed that since the westerly Costco driveway is situated on the inside of a concave curvature in alignment, the visibility exiting the Costco store side of the driveway is severely limited. Actual motorist views of this sight distance are presented in the Appendix. As a result of this limited visibility, motorists must pull out of the Costco store exit well past the stop limit line to see on -coming (and non stopping) Park Avenue through traffic. This "pulling out into the intersection for visibility," although undesirable, is partially mitigated by the striping of a right turn lane for westbound Park Avenue at the westerly Costco store driveway. Even so, the installation of a four way stop control eliminates the issue of the restricted sight distance. The field review also revealed the presence of some pedestrians and bicycles at this location. Under current conditions, pedestrians and bicycle crossings of Park Avenue are difficult at best at the westerly Costco driveways due to the restricted visibility, and speed and lack of adequate gaps on Park Avenue. Here again, the installation of four-way stop control, which is otherwise warranted, also addresses the safety for pedestrian and bicycle crossings at the westerly Costco/Gas Station driveways even though it is acknowledged that the number of pedestrians and bicycles involved is modest. To evaluate the effect of installation of four-way stop signs at the westerly Costco/Gas Station driveways, AFA prepared a Synchro flow simulation to evaluate the impact and effectiveness of adding stop control to the through traffic on Park Avenue. The results which can be verified by viewing the simulation, indicate that, as expected, some delay is created for the through movement on Park Avenue. However, this is offset by the fact that traffic can safely exit the westerly Costco driveways without appreciable delay and without requiring motorists to "squeeze" into the otherwise uninterrupted flow of eastbound traffic on Park Avenue. The all -way stop also improves the safety of pedestrians and bicycles which occur in modest numbers at this location and would substantially reduce the potential for vehicular collisions. The traffic flow at the Lowes driveway is virtually unchanged, as indicated by the Synchro traffic flow simulation. From a practical point of view, we expect some traffic that currently exits at the Lowes driveway to shift to the westerly Costco exit once the all -way stop is in place. CONCLUSION In summary, it is concluded that a four-way stop control not only far exceeds the minimum volume warrant conditions, but also reduces delay, substantially increases visibility and safety, and reduces accidents for motorists exiting the westerly Costco/Gas Station driveways on Park Avenue. 016030mm.doc O_ H U I �o 00 00 `o M N M M 01 M N V) cq [q 0 01 000 O O _ r 000, v, 00 Cl) 0 00 M �o OCli 00 M N ,It ON 00 eq Cl) p N 00 � � G n M M 00 n Vl r- - 00 01 M M N N N h N � N � b b lu a U � 5 x N l- 00 �o M ,n .N� l� tn N 't M - N M Itt h �o r 00 Q MUTCD 2003 California Supplement Figure 4C-101 (CA) TRAFFIC SIGNAL WARRANTS WORKSHEET DIST CO RTE PM COUNT DATE CALC DATE CHK DATE Major Street: Park Avenue Critical Approach Speed: 35 mph Minor Street: Costco Driveway Critical Approach Speed: 25 mph Speed limit or critical speed on major street >64 km/h (40 mph) OR, In built up area of isolated community of < 10,000 population .................. RURAL (R) URBAN (U) X The satisfaction of a warrant is not necessarily justification for a signal. Delay, congestion, confusion or other evidence of the need for right-of-way assignment must be shown. Four -Way Stop Control Austin -Foust Associates, Inc. Park Avenue and Costco Driveway A-2 016030mm-App.pdf MUTCD 2003 California Supplement WARRANT 1— Eight Hour Vehicular Volume (Condition A or Condition B or Combination of A and B Must Be Satisfied) Condition A - Minimum Vehicle Volume SATISFIED: Yes 100% SATISFIED: No 80% SATISFIED: Yes MINIMUM REQUIREMENTS (80% SHOWN IN BRACKETS) U I R U I R HOUR APPROACH 1 2 o More 12-1 PM 1-2PM 6-7PM 7-8 PM 5-6PM 2-3PM 4-5 PM 3-4PM LANES Both Approaches 500 350 600 420 1,287 1,266 1,205 1,182 1,119 1,068 1,052 1,027 Major Street (400) (280) (480) (336 Highest Approach 150 105 200 140 175 181 183 183 142 164 171 165 Minor Street (120) (84) (160) (112) Condition B — Interruption of Continuous Traffic 100% SATISFIED: Yes 80% SATISFIED: Yes MINIMUM REQUIREMENTS (80% SHOWN IN BRACKETS) U I R U I R HOUR APPROACH 1 2 o More 12 -IPM 1-2PM 6-7PM 7-8 PM 5-6PM 2-3PM 4-5PM 3-4PM LANES Both Approaches 750 525 900 630 1,287 1,266 1,205 1,182 1,119 1,068 1,052 1,027 —Major Street 600) (420) (720) 504) Highest Approach 75 53 100 70 175 181 183 183 142 164 171 165 Minor Street (60) (42) (80) (56) Combination of Conditions A & B SATISFIED: No REQUIREMENT CONDITION A. Minimum Vehicular Volume J TWO CONDITIONS Yes SATISFIED 80% AND J B. Interruption of Continuous Traffic AND An adequate trial of other alternatives that could cause less delay and inconvenience to traffic has failed to solve the traffic No problems The satisfaction of a warrant is not necessarily justification for a signal. Delay, congestion, confusion or other evidence of the need for right-of-way assignment must be shown. Four -Way Stop Control Austin -Foust Associates, Inc. Park Avenue and Costco Driveway A-3 016030mm-App.pdf MUTCD 2003 California Supplement Table 4C-1 Warrant 1, Eight Hour Vehicular Volume Condition B — Interruption of Continuous Traffic Condition A — Minimum Vehicular Volume Vehicles Per Hour on Higher -Volume Number of Lanes for Moving Vehicles Per Hour on Major Street Minor -Street Approach Vehicles Per Hour on Higher -Volume Number of Lanes for Moving Vehicles Per Hour on Major Street Major Street Minor Street Minor -Street Approach 100°/ua 80%b 70%£ 56%4 Traffic on Each Approach (Total of Both Approaches) 75 60 53 42 2 or more 1 (One Direction Only) 75 60 53 42 Major Street Minor Street 100% 80%b 70°/6`- 56%d 1000/0, 80%b 70%° 56%4 1 1 500 400 350 280 150 120 105 84 2 or more 1 600 480 420 336 150 120 105 84 2 or more 2 or more 600 480 420 336 200 160 140 112 1 2 or more 500 400 350 280 1 200 160 140 112 Condition B — Interruption of Continuous Traffic Vehicles Per Hour on Higher -Volume Number of Lanes for Moving Vehicles Per Hour on Major Street Minor -Street Approach Traffic on Each Approach (Total of Both Approaches) (One Direction Only) Major Street Minor Street 1000/61 80%b 70°/6`- 560/o° 100°/ua 80%b 70%£ 56%4 1 1 750 600 525 420 75 60 53 42 2 or more 1 900 720 630 504 75 60 53 42 2 or more 2 or more 900 720 630 504 100 80 70 56 1 2 or more 1 750 600 525 420 1 100 80 70 56 a Basic minimum hourly volume (Urban Areas). b Used for combination of Conditions A and B after adequate trial of other remedial measures (Urban Areas). May be used when the major -street exceeds 64 km/h or exceeds 40 mph or in an isolated community with a population of less than 10,000 (Rural Areas). d May be used for combination of Conditions A and B after adequate trial of other remedial measures when the major - street speed exceeds 64 km/h or exceeds 40 mph or in an isolated community with a population of less than 10,000 (Rural Areas). The satisfaction of a warrant is not necessarily justification for a signal. Delay, congestion, confusion or other evidence of the need for right-of-way assignment must be shown. Four -Way Stop Control Austin -Foust Associates, Inc. Park Avenue and Costco Driveway A-4 016030mm-App.pdf MUTCD 2003 California Supplement WARRANT 2 - Four Hour Vehicular Volume Record hourly vehicular volumes for any four hours of an average day. SATISFIED: Yes All plotted points fall above the curves in Figure 4C-1 (Urban Areas) Yes OR All plotted points fall above the curves in Figure 4C-2 (Rural Areas) The satisfaction of a warrant is not necessarily justification for a signal. Delay, congestion, confusion or other evidence of the need for right-of-way assignment must be shown. Four -Way Stop Control Austin -Foust Associates, Inc. Park Avenue and Costco Driveway A-5 016030mm-App.pdf 2 or HOUR APPROACH LANES One more 12 -IPM I-2PM 6-7PM 7-8PM Both Approaches - Major Street X 1287 1,266 1,205 1,182 Higher Approach - Minor Street X 175 181 183 183 All plotted points fall above the curves in Figure 4C-1 (Urban Areas) Yes OR All plotted points fall above the curves in Figure 4C-2 (Rural Areas) The satisfaction of a warrant is not necessarily justification for a signal. Delay, congestion, confusion or other evidence of the need for right-of-way assignment must be shown. Four -Way Stop Control Austin -Foust Associates, Inc. Park Avenue and Costco Driveway A-5 016030mm-App.pdf MUTCD 2003 California Supplement WARRANT 3 - Peak Hour (Part A or Part B Must Be Satisfied) PART A (All parts 1, 2, and 3 below Must Be Satisfied for the same one hour, for any four consecutive 15 -minute periods) SATISFIED: Yes SATISFIED: No 1. The total delay experienced for traffic on one minor street approach (one direction only) controlled by a STOP sign equals or No exceeds four vehicle -hours for a one -lane approach, or five vehicle -hours for a two-lane approach; AND 2. The volume on the same minor street approach (one direction only) equals or exceeds 100 vph for one moving lane of traffic or Yes 150 yph for two moving lanes; AND 3. The total entering volume serviced during the hour equals or exceeds 800 vph for intersections with four or more approaches or Yes 650 vph for intersections with three approaches. PART B 2 or HOUR APPROACH LANES One more Both Approaches - Major Street X 1,494 -Higher Approach - Minor Street X 157 SATISFIED: Yes The plotted point falls above the curve in Figure 4C-3 (Urban Areas) Yes OR The plotted point falls above the curve in Figure 4C-4 (Rural Areas) The satisfaction of a warrant is not necessarily justification for a signal. Delay, congestion, confusion or other evidence of the need for right-of-way assignment must be shown. Four -Way Stop Control Austin -Foust Associates, Inc. Park Avenue and Costco Driveway A-6 016030mm-App.pdf MUTCD 2003 California Supplement WARRANT 7 — Crash Experience Warrant (All Parts Must Be Satisfied) SATISFIED: No Adequate trial of alternatives with satisfactory observance and enforcement has failed to reduce the crash frequency. No REQUIREMENTS: Number of crashes within a 12 month period susceptible to correction by a traffic signal, and involving injury or damage exceeding the requirements for a reportable crash No 5 OR MORE REQUIREMENTS CONDITIONS X Warrant 1, Condition A - Minimum Vehicular Volume X ONE CONDITION OR Warrant 1, Condition B — Interruption of Continuous Traffic X Yes SATISFIED 80% OR Warrant 4, Pedestrian Volume Condition: Pedestrian Volume >_ 152 for any hour OR Pedestrian Volume >_ 80 for any 4 hours The satisfaction of a warrant is not necessarily justification for a signal. Delay, congestion, confusion or other evidence of the need for right-of-way assignment must be shown. Four -Way Stop Control Austin -Foust Associates, Inc. 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