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Home My WebLink About4.07 AVB@VP RvsdSgnl&StripeCITY OF DUBLIN AGENDA STATf~4ENT City Council Meeting Date: August 11, 1986 SUBJEC~: Revised Striping and Signal Phasing - Amador Valley Blvd./Village Parkway Intersection EXHIBITS ATTACHED: RECOX~qENDATION'~ FINANCIAL STATEMENT: Report from TJKM Diagram of Intersection Authorize Staff to Implement Revision Cost of revised striping and signing is estimated at $1,500.00. Sufficient funds are budgeted. DESCRIPTION: Due to increased traffic volume on Amador Valley Blvd., Staff has investigated the possibility of converting the northerly eastbound through lane on Amador Valley Blvd. at Village Parkway to a shared through/left-turn lane. This measure would allow two lanes to turn left from Amador Valley Blvd. onto Village Parkway and alleviate some of the backup in the existing single left-turn lane. Signal phasing would be changed from the current six-phase to four- phase; in other words, east- and westbound traffic would travel through the intersection separately rather than at the same time as they do now. Based on TJKM's study of the intersection, Staff recommends that the City Council authorize implementation of this change. ITEM NO. COPIES TO: £- TJKM TRANSPORTATION CONSULTANTS PLEASANTON SACRAMENTO FRESNO CONCORD July 7, 1986 Mr. Lee Thompson City of Dublin Public Works Department 6500 Dublin Boulevard, Suite 101 Dublin, CA 94568 JUL ,': 1986 'PUBI.; WORKS[ Subject: Revised striping and phasing at the Amador Valley Boulevard/Village Parkway intersection. Dear Lee: The possibility of converting the northerly eastbound through lane on Amador Valley Boulevard at Village Parkway to a shared through/left-turn lane has been reviewed. Volume-to-capacity (V/C) calculations were performed for the Amador Valley Boulevard/Village Parkway intersection. The result indicates that this intersection would remain at Level of Service A (LOS A) indicating stable flow and very slight delay after the modification. The V/C ratio would drop from 0.56 to 0.54 (see attachment). Based on V/C calculations and field investigation, we recommend modifying the existing 6-phase signal to a 4-phase signal as shown in the attached drawing. This would involve some signing and striping modifications. As noted in the drawing, we are recommending the placement of a YIELD sign in the northeast quadrant of the intersection. The sign would control westbound traffic that is turning right. The need for this sign is based on the presence of two lanes of eastbound left turning traffic merging with the westbound right turning traffic and the need to assign the right-of-way to the left turners. I hope this letter provides the information you need. If you have any further questions, please call. Yours very truly, Ty /~T~kkawa DY/psw Attachment 157-030 4637 Chabot Drive, Suite 214 / Pleasanton, California 94566 · (415) 463-0611 TJKM INTERSECTION CAPACITY ANALYSIS 2/4/86 INTERSECTION 5 VILLAGE PKWY. and AMADOR VALLEY DUBLIN COUNT DATE/TIME: 1/15/86 4:00-5:45 PM PEAK HOUR: 4:15-5:15 PM CONDITION : PM PEAK - EXISTING FILE 15728 ======================================================================== RIGHT THRU LEFT 271 263 6O ^ , , ' ^ NORTH ' (--- v ---) LEFT 306 --- 1.0 1.5 2.0 1.0 1.5 --- 67 RIGHT STREET NAME: THRU 443 ---) 2.0 (NO. OF LANES) 2.0(--- 240 THRU AMADOR VALLEY RIGHT 78 --- 1.5 2.1 2.1 1.5 1.0 --- 108 LEFT SPLIT PHASE? , (--- ^ ---) ' N m ! i ! ! ! I I 334 288 148 LEFT THRU RIGHI STREET NAME: VILLAGE PKWY. SPLIT PHASE? Y :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: ORIGINAL ADJUSTED V/C CRITICAL MOVEMENT VOLUME VOLUME* CAPACITY RATIO V/C NB SB RIGHT (R) THRU (T) LEFT {L) T+L 148 40 * 1650 0.0242 288 288 3375 0.0853 334 334 2970 0.1125 622 4695 0.1325 271 0 * 1650 O.O00D 263 263 3450 0.0762 60 60 1650 0.0364 RIGHT (R) THRU (T) LEFT (L) 0.1325 0.0762 EB RIGHT (R) 78 0 * 1650 0.0000 THRU (T) 443 443 3450 0.1284 LEFT (L) 306 306 1650 0.1855 WB RIGHT (R) 67 0 * 1650 0.0000 THRU (T) 240 240 3450 0.0696 LEFT (L) 108 108 1650 0.0655 0.1855 0.0696 ======================================================================== VOLUME-TO-CAPACITY RATIO FOR THE INTERSECTION: 0.46 ADJUSTMENT FOR LOST YELLOW TIME: 0.10 TOTAL VOLUME-TO-CAPACITY RATIO: INTERSECTION LEVEL OF SERVICE: * ADJUSTED FOR RIGHT TURN ON RED RECEI¥ T) JUL 7 1986 PUBLIC- WORKS 0.56 A TJKM INTERSECTION CAPACITY ANALYSIS 6/3o/86 INTERSECTION I VILLAGE PkWY and AMADOR VALLEY CITY OF DUBLIN COUNT DATE/TIME: 1/15/86 4:00-5:45 PM PEAK HOUR: 4:15-5:15 PM CONDITION : P.M. PEAK - EXISTING FILE 157001 RIGHT THRU LEFT 271 263 60 ' <--- v ---> LEFT 306 --- 2.1 1.5 2.0 1.0 1.5 67 RIGHT STREET NAME: THRU 443 ---) 2.1 (NO. OF LANES) 2.0<--- 240 THRU AMADOR VALLEY RIGHT 78 --- 1.5 2.1 2.1 1.5 1.0 --- 108 LEFT SPLIT PHASE? , (--- ,' ___> , y 334 288 148 LEFT THRU RIGHT NORTH STREET NAME: VILLAGE PKWY SPLIT PHASE? Y ORIGINAL AD3USTED V/C CRITICAL MOVEHENT VOLUHE VOLUME~ CAPACITY RATIO V/C NB RIGHT (R) 148 40 ~ 1650 0.0242 THRU (T) 288 288 3375 0.0853 LEFT (L) 334 334 2970 0.1125 T + L 622 4695 0.1325 0.1325 SB RIGHT (R) 271 101 $ 1650 0.0612 THRU (T) 263 263 3450 0.0762 0.0762 LEFT (L) 60 60 1650 0.0364 EB RIGHT (R) 78 0 * THRU (T) 443 443 LEFT (L) 306 306 T + L 749 WB RIGHT (R) 67 0 ~ THRU (T) 240 240 LEFT (L) 108 108 1650 0.0000 3375 0.1313 2970 0.1030 4695 0.1595 0.1595 1650 0.0000 3450 0.0696 0.0696 1650 0.0655 TOTAL VOLUME-TO-CAPACITY RATIO: INTERSECTION LEVEL OF SERVICE: VOLUME-TO-CAPACITY RATIO FOR THE INTERSECTION: 0.44 AD3USTMENT FOR LOST YELLOW TIME: 0.10 0.54 A ADJUSTED FOR RIGttT TURN ON RED RECEIVED JUL ? 1986 PUBLIC':, WORKS >~L ZEy ?',C/1££1( 5,,.b.,;:q2 .~,'5-c~'~zv/,d~ Aw,'., 1 ', 1 i .C..~:T,',';' hJA/,'~ ~;V,9 , ~./.'/>.:.~,"~ .4 7/(:,.V'. /(I//10,')%' ~/~..'L: ',, /. q V,.~ .... '~:.