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Home My WebLink AboutAgenda Report - October 2, 1991 (47),4 OF chi ��o CITY OF LODI AGENDA TITLE: Acacia Street and Washington NI ETW-j DATE: October 2, 1991 PREPARED BY: Public Works D i rectcr RECOMMENDED ACTION: No Action COUNCIL �:OMMUNICATION C reet - Intersection Control, Resurvey BACKGROUND IlqF(F&1AJ .' At the August 21, 1991 City Council meeting, a citizen expressed a concern regarding speed control on South Washington Street in the vicinity of Acacia Street. At that meeting City Council directed Public Works staff to resurvey this location for four-way stops. This location was previously studied for four-way stops at the request of citizens in the area (by petition) and was (pCresented to City Council at the January 2, 1991 meeting. Four-way stop guidelines altrans) were not satisfied, however, Council did approve the conversion from yield signs to stop signs on Acacia Street at Washington Street. Another concern expressed at that meeting was the slight alignment offset of Washington Street at Acacia Street. At the February 20, 1991 meeting, City Council approved the modification of the street centerlines on Washington Street at Acacia Street to provide a smoother transition through the intersection. This worm was completed in March of 1991. Staff reviewed accidents on the segment of Washington Street from Kettleman Lane to Watson Street. Two-way traffic is permitted along the entire length of this segment with the exception of the portion between Concord Street and Poplar Street which is one-way for southbound traffic. A review of available accident records on the segment of Washington Street from Kettleman Lane to Watson Street indicates there has been two accidents since the previous study in January. In total, from 1987 to the present there have been eleven accidents in this segment (Exhibit A). None of these accidents were identified as being speed related. Poplar Street was the only intersection in this segment of Washington Street with accidents (right angle) that would be correctable with the installation of four-way stops. These two accidents occurred i n 1987 and both involved westbound drivers failing to yield to southbound vehicles. No accidents have occurred at this intersection since the yield signs were changed to stop signs. Staff previously surveyed vehicle speeds on Washington Street over a three-day period from July 18-20, 1989. The results of this survey are shown on Exhibit B. APPROVED. THOMAS A. PETERSONK�e.. Acacia Street and Washington Street - Intersection Control, Resurvey October 2, 1991 Page 2 Resurvey Results As shown on the attached Exhibit C, Caltrans guidelines for the installation of four-way stops are not satisfied at this location. There have been no accidents correctable with the installation of four-way stops at this intersection and traffic volumes are far below the required minimlmis. The volume split on Washington Street and on Acacia Street is 68%and 32%, respectively. Ideally, volume splits at four-way stop locations should be equal. Four-way stop warrants were also performed for the intersection of Poplar Street and Washington Street as part of a 1989 study. Correctable accidents and traffic volumes were far below the required minimums at this location also. Council did approve the conversion from yield to stop controls cn Poplar Street at Washington Street at that time. Since the time of this study, there have been no additional correctable accidents. The result of staff's survey of vehicle speed for approximately 1,600 vehicles on Washington Street in the vicinity of Acacia Street indicates that 92%of the motorists drive 31 mph or less and 63%at 25 mph or below. This is not unusual for streets with 25 mph speed limits. Discussion As Council is aware, studies indicate that the installation of stop signs has little or no effect cn reducing overall vehicle speeds except at the immediate vicinity of the stop sign. In nmry cases, speeds will increase on segments adjacent to stop signs as drivers will attempt to "make-up" travel time after having to stop at an unwarranted stop sign. In addition to an increase in speeds, unneeded stop signs may increase accidents (particularly rear -end accidents), waste time and energy, create air and noise pollution, and encourage noncompliance at needed stop signs. Recommendation Based on the study results and the proven ineffectiveness of stop signs used for speed control, staff does not recommend the installation of four-way stop signs at Acacia Street and Washington Street or any other intersection along %hissegment. Increased enforcement is the most effective way to control excessive speeds. The speed data used in this study will be sent to the Police Department for their review FUNDING: None. -�✓Jack R J c onsko Public Works Director Prepared by Rick S. Ki ri u, Senior Engineering Technician JLR/RSK/nI CACACIA/TXTW.02M (M COM) September 25, 1991 CITYOF LODI70�0' PUBLIC WORKS DEPARTMENT Exhibit A WATSoN "[0 1!-T'Tl r-- ~tAO V-pTT1,=- t --v,!-1 L - l - 1`17- tcmt L r-� t�? 00 '`� sI eEC,WIPE LOCATION:V '-7PAI Y3'�OP_V10IF-D131P Yf5f YF AR( -,I-. Mb7-kl6 1991 No. DATE TIME DAMAGE INJURED APPARENT CAUSE (A) 1 fo-I�i- t`ts7 tom- MA -3 3 IUJJzE b Yle4 > 'G �-irt-87 19 Mot> -T'bb FAtt tit? -t: YtEt t� . t9 GN tot-! 3 10-ZEtgi-7 MAS t FAtt-u Yta;t> 4 It -+ -87 tt t till -Mit -t p(.I�At G t'�AEIt lea o t1 4 "VI d - "�-J' tt320 t �A�-t�tot� o ;-Ft�i �A�r� Tu0.-ts • +IAD INKi 7 -6 050 t -410-t-1113 13 0-12-88 zth uNv- -MIP 0 MuoWl"6 N►T "Id Soto MttJ -r)" I a: W SIM Of to 8 -10 -moi I 21h wot-IE - Mob O pLt t t-, MWA 014 ' [e 9.ot i i" - !t l O f!F C41 uFt F� h fV4CXI ii� t + � II 1 DATE: 11 Washington St @ Acacia St Speed Survey July 18-20,1989 III Northbound El Southbound 0 28-29 30-31 32-33 34-35 36-37 38-39 >40 Speed Range (MPH} Va. C14TWASHIALC CITY OF LODI . • PUBLIC WORKS DEPARTMENT Exhibit C MULTI -WAY STOP SIGN WARRANTS INTERSECTION OF G,aG{3• %• Y and WAS 4-4—,00 DA i E �i✓'-Ir, BY i2 - Z! V_l 1 Any of the following conditions n y warrant a multi -way STOP sign installation, i. Where traffic signals are warranted and the need is urgent, the four-way stop is an interim measure that can be installed quickly to control traffic while arrangements are being made for the signal installation, Satisfied Not Satisfied V/ 2. An accident problem, as indicated by five or more reported accidents of a type susceptible of correction by a multi -way stop installation in a 12 -month period. Types of accidents susceptible of correction include right angle and 1 eft turn collisions. Time period __! 11C' Number of correctible accidents v Total number of accidents D Satisf ied Not Satisfies 3. Minimum volume warrant: a. The total vehicular volume entering the intersection from a77 approaches must average at least 500 vehicles per hour for any eight hours of an average day, and 1 r CV ,en 1k �� .v � Highest 8 hours a.m. to p.m. Hour � � �� / n// fi^/V ' ToTal volume d-t�— vehicles Major Street ]%? { 14-0� L�°( 3b {?2 Isel Average per hours vehicles ,Minor Street l 7 { IP { 17 { 32 { I'l b. The combined vehicular and pedestrian volume from the minor street or highway must average at least 200 units per hour for the same eight hours with an average delay to minor street vehicular traffic of at least 30 seconds per vehicle during the maximum hour. Hour �� f '� yj� �(� (�V �� ? Highest 8 hours am. to p.m. 41 Average per hour : a vehicles — vehorTetteir L'( ►� 1'i :5e7 t� {2 l� L�j Average per hour pedestrians (EST) Pedestri ans 4 Average units per hour PFre, t2FY17 -ro Satisfied Not Satisfied__ 4. When the 85 -percentile approach speed of the major street traffic exceeds 40 miles per hour, the minimum vehicular volume warrant is 70 percent of the above requirements. 85 -percentile speed NPH Satisfied Not Satisfied A four-way STOP sign installation i.; a useful traffic control measure when other available means of control are not adequate. It should not be used unless the volume of traffic on the intersecting roads is about equal and is undesirable at low volume intersections. �- % Traffic major street L(s %�= % Traffic minor street: � !— CITY COUNCIL DAVID Ni- HINCHMAN, Mayor JAMESW. PINKERTON. jr- Mayor rMayor Pro Tempore PHILLIP A. PENNINO JACKA. SIECLOCK JOHNR. (Randy) SNIDER Mr. Ken K r CI'T'Y OF LODI CITY HALL. 221 WEST PINE STREET P.O.BOX 3006 LODI. CALIFORNIA95241-1910 (209)334-5634 FAX [209) 333-6795 September 26, 1991 SUBJECT: Acacia Street and Washington Street - Intersection Control, Resurvey THOMAS A. PETERSON City Manager ALICE M. REIMCHE City Clerk BOB McNATT City Attorney Enclosed 1 s a copy of background information on an item that will be discussed at the City Council meeting on Wednesday, October 2, 1991, at 7:30 p.m. The meeting will be held in the City Council Chamber, Carnegie Forum, 305 Wcst Pine Street. Ycu are welcome to attend. If you wish to communicate with the City Council, please contact Alice Reimche, City Clerk, at (209) 333-6702. If you have any questions about the item, please call Paula Fernandez, Richard Prima or rile at (209) 333-6706. cP",Ld 0 .t Jack L. Ronsko Public Works Director JLR/lm Enclosure cc: City Clerk NACACIA/TXTW.02M