The URL can be used to link to this page

Home My WebLink About8.1 BiAnnlTrffcSftyRp CITY CLERK File # ~[Q]-~~ AGENDA STATEMENT CITY COUNCIL MEETING DATE: July 1, 1997 SUBJECT: Bi-Annual Traffic Safety Report and Downtown Intersection Monitoring Report Report Prepared by: Lee S. Thompson, Public Works Director EXHIBITS ATTACHED: 1) 2) 3) Traffic Safety Report £fom TJKM Accident Location Map to be displayed at meeting A representative ofTJKM will attend the meeting to answer any questions regarding the report. RECOMMENDATION~w+- Receive presentation FINANCIAL STATEMENT: No new recommendations were made as a result of this study. Items that are noted as recommendations are already included in either the Operating Budget or Capital Improvement Program. DESCRIPTION: In 1987, the City Council directed Staff to prepare a Citywide Traffic Safety Report which would identify locations that experienced a significant number of traffic accidents and make recommendations for possible means of improving safety at these locations. Since that time, Staff, through the City's traffic consultant TJKM, has prepared the Annual Traffic Safety Reports and presented them to the City Council. This traffic safety report is combined with a "downtown intersection monitoring" report per the Downtown Specific Plan recommendation. Because of the extensive consultant and Staff time involved in preparing these reports each year, the City Council directed that these reports be presented on a biannual basis in the future. Staff will continue to monitor accident patterns, and if safety- related improvements appear to be warranted during the course of the two-year period, Staff will take appropriate action at that time. ANNUAL TRAFFIC SAFETY REPORT Following is a summary of the information contained in TIKM's report. A total of247 reported accidents occurred in 1996,50 of which were injury accidents. There was one fatal accident. The total number of accidents in 1996 is slightly lower than the 1995 total of257 and also slightly lower than the average of the three previous years, which was 254 accidents. The number of injury accidents in 1996 (50) appears much higher than the previous average of22 as a result of some policy changes in the way injury accidents are reported by Police Services. In the past, accidents were only ------------------------------------------------------------------- COPIES TO: TJKM .." ITEMNO.~ g: \traffic\agstsfty termed "injury" if the injured party was treated by medical personnel and/or transported in an ambulance. The accidents are now termed "injury" accidents if there is a complaint of pain. Staff feels that the severity of accidents has not increased over prior years. The Institute of Transportation Engineers' Manual of Traffic Studies recommends that any accident within 100 feet of an intersection be classified as an intersection accident, while those further than 100 feet rrom the intersection be classified as a roadway segment accident. This method has been used for the purposes of this report with the exception that several rear-end accidents located further than 100 feet rrom an intersection were classified as intersection accidents based on a review of the accident reports. Intersections and street segments were selected which had incurred an average of more than three accidents during the three years rrom 1994 through 1996, and accident rates were then calculated for these locations. The accident rate is a function of the number of accidents and number of vehicles traveling the road segment or entering the intersection per day. TJKM's report discusses the methods of calculation for determining accident rates for intersections and major and minor roadway segments. The resulting accident rates were compared with the State average, and those locations which exceeded the State average were analyzed to see if changes could be made to improve the safety of the intersections or street segments. Tables IT and III ofTJKMs report identify the locations for which calculations were made and the comparative accident rates. The philosophy behind using this method of accident rate comparison is that intersections and roadway segments with high traffic volumes tend to incur more traffic accidents as a matter of course. An intersection with a moderate number of accidents and high traffic volume would have a comparatively low accident rate, while an intersection with few accidents but very low traffic volume could have a comparatively high accident rate. For example, the Dougherty Road/I-580 Om-amp intersection had an average of 6.7 accidents over the past three years, and 60,100 vehicles per day entering the intersection. The accident rate at this intersection is considerably lower than the State of California accident rate. However, the Dublin Boulevard/Hacienda Drive intersection had an average of only three accidents over the past three years, with only 9,850 vehicles per day entering the intersection. The accident rate at this intersection is 50% higher than the State of California accident rate. Such an intersection may need more attention than a location with a higher number of accidents and a high Average Daily Traffic number (ADT), depending on the types of accidents that occur. The Average Daily Traffic is the average number of vehicles entering an intersection or street segment during a 24-hour period. Seven intersections and eleven street segments were found to have accident rates higher than the State average. Following is a discussion of the conditions and recommendations for these locations. Accident diagrams are included as a part ofTJKM's report. Intersections Dublin Boulevard / Hacienda Drive: The two accidents that occurred here in 1996 were the result of drivers failing to stop at the stop sign. A traffic signal is currently under construction at this location. There are no further recommendations at this time. Dublin Boulevard / Regional Street: Eleven accidents were reported here in 1996 which is consistent with the number of reported accidents over the past three years. The 1996 accidents included five right-angle Page 2 accidents, one sideswipe, and five rear-enders. Rear-end accidents are fairly common at high-volume, signalized intersections and are usually attributable to driver inattention. Most of the other accidents were the result of an unsafe lane change or turn. Prior to construction of the Dublin Boulevard Widening improvements, when the north-south traffic did not have a protected left turn phase, this intersection incurred a number of "failure to yield on left turn" accidents. Now that a separate left turn phase is in place, this type of accident has virtually been eliminated. There are no further recommendations. San Ramon Road / Silvergate Drive: Two rear-end accidents occurred here in 1996. As noted above, this type of accident is common at signalized intersections. There are no recommendations at this time. Village Parkway / Lewis Avenue: This intersection incurred two rear-end accidents in 1996. A third accident involved a vehicle striking a tree. There are no recommendations at this time. Dougherty Road / Dublin Boulevard: Seven accidents occurred here in 1996, which is significantly less than in prior years. There is no discernible accident pattern and no improvements are recommended at this time. Dublin Boulevard / San Ramon Road: Twenty accidents occurred at this intersection in 1996, which is a higher number than in prior years. There is no discernible accident pattern; however, the intersection was under construction during 1996, which may have influenced the number of accidents. Staff recommends continuing to monitor the intersection in the future. Amador Valley Boulevard / Donohue Drive: Three accidents occurred here in 1996. There is no discernible accident pattern, and no recommendations are made at this time. Roadway Segments Regional Street (Amador Valley to Dublin Blvd.): Four accidents occurred in this segment in 1996. There is no discernible accident pattern, and no recommendations are made at this time. Shannon Avenue (San Ramon Road to Shannon Court): This segment is included because of the three- year average; no accidents occurred in 1996. There are no recommendations at this time. Amador Plaza Road (Amador Valley to Dublin Blvd.): This segment is primarily included because of the three-year average; only one accident occurred in 1996. There is no discernible accident pattern, and no recommendations are made at this time. Village Parkway (Lewis Avenue to Dublin Blvd.): Four accidents occurred in this segment in 1996, three of which were related to vehicles entering or leaving driveways. There is no discernible accident pattern, and no recommendations are made at this time. San Ramon Road (Bellina Street to Alcosta Blvd.): Three accidents occurred here in 1996. There is no discernible accident pattern, and no recommendations are made at this time. Dublin Boulevard (Village Parkway to Clark Avenue): Four accidents occurred here in 1996, which is fewer than in prior years. There is no discernible accident pattern, and the only recommendation made at this time is to continue monitoring the location. Page 3 Dublin Boulevard (Hansen Drive to Donlon Way): Three accidents of different types and with varying causes occurred here in 1996. Staffis in the process of improving the striping along this roadway segment so that the "trap" right turn lane for Hansen Drive is more apparent. In addition, the City Council recently approved the installation of stop signs at the DublinlHansen intersection as an interim measure until a traffic signal can be constructed. Dublin Boulevard (Golden Gate to Amador Plaza): Four accidents occurred here in 1996, one related to a driveway and the others related to driver inattention. No recommendations are made at this time except to continue monitoring the location. Village Parkway (Lewis Ave. to Amador Valley): Two accidents occurred here in 1996. There is no discernible accident pattern, and no recommendations are made at this time. Amador Valley Boulevard (Village Parkway to York Drive): Only one accident occurred here in 1996. There is no discernib]e accident pattern, and no recommendations are made at this time. Dublin Boulevard (Regional Street to Golden Gate Drive): Of the six accidents that occurred here in 1996, two involved buses pulling out rrom a bus stop, and others involved vehicles entering or exiting driveways. With the opening of the BART station, the bus traffic on Dublin Boulevard has been greatly reduced, and additionally, LA VT A is in the process of pursuing construction of bus turnouts in this segment for their remaining route. There are numerous driveways in this segment, and the roadway has been restriped rrom four to six lanes. Staff recommends continuing to monitor this location in the future. Page 4 ~~....on COnsu..... REVISED DRAFf 1996 Traffic Safety Study In the City of Dublin JUNE 1997 PLEASANT ON· FRESNO· SANTA ROSA 3,/ REVISED DRAFT 1996 Traffic Safety Study In the City of Dublin June 12, 1997 Prepared by T JKM Transportation Consultants 4234 Hacienda Drive, Suite 101 Pleasanton, California 94588-2721 (510) 463-0611 rhm 96SAFETY.1NA TABLE OF CONTENTS Page INTRODUCfION ........ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Accident Trends ............................................................. 1 Accident Rate Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2 Method of Selecting High Accident Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2 Intersections .............................................................. 2 Roadway Segments ......................................................... 3 RECOMMENDATIONS ......................................................... 5 Intersection Traffic Safety Improvements ............................................ 5 Hacienda Drive and Dublin Boulevard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5 Collision Diagram 1 - Hacienda Drive and Dublin Boulevard . . . . . . . . . . . . . . . . . . . . . . . . .. 6 Dublin Boulevard and Regional Street ........ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7 Collision Diagram 2 - Dublin Boulevard and Regional Street . . . . . . . . . . . . . . . . . . . . . . . . . . 8 San Ramon Road and Silvergate Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 9 Collision Diagram 3 - San Ramon Road and Silvergate Drive ......................... 10 Village Parkway and Lewis Avenue . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 11 Collision Diagram 4 - Village Parkway and Lewis A venue . . . . . . . . . . . . . . . . . . . . . . . . . . .. 12 Dougherty Road and Dublin Boulevard ........................................... 13 Collision Diagram 5 - Dougherty Road and Dublin Boulevard ......................... 14 San Ramon Road and Dublin Boulevard .......................................... 15 Collision Diagram 6 - San Ramon Road and Dublin Boulevard ........................ 16 Donohue Drive and Amador Valley Boulevard .... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 17 Collision Diagram 7 - Donohue Drive and Amador Valley Boulevard ........... . . . . . . . .. 18 Roadway Segment Traffic Safety Improvements ....................................... 19 Regional Street between Amador Valley Boulevard and Dublin Boulevard. . . . . . . . . . . . . . . . . .. 19 Collision Diagram 8 - Regional Street between Amador Valley Boulevard and Dublin Boulevard. 20 Sharmon Avenue between Sharmon Court and San Ramon Road. . . . . . . . . . . . . . . . . . . . . . . . .. 21 Amador Plaza Road between Amador Valley Boulevard and Dublin Boulevard ............... 22 Village Parkway between Lewis Avenue and Dublin Boulevard .......................... 24 Collision Diagram 10 - Village Parkway between Lewis A venue and Dublin Boulevard ....... 25 San Ramon Road between Bellina Street and Alcosta Boulevard . . . . . . . . . . . . . . . . . . . . . . . . .. 26 Collision Diagram 11 - San Ramon Road between Bellina Street and Alcosta Boulevard . . . . . .. 27 Dublin Boulevard between Village Parkway and Oark Avenue . . . . . . . . . . . . . . . . . . . . . . . . . .. 28 Collision Diagram 12 - Dublin Boulevard between Village Parkway and Oark Avenue. . . . . . ., 29 Dublin Boulevard between Hansen Drive and Donlon Way ............................. 30 Collision Diagram 13 - Dublin Boulevard between Hansen Drive and Donlon Way .......... 31 TABLE OF CONTENTS Page Dublin Boulevard between Golden Gate Drive and Amador Plaza Road .................... 32 Collision Diagram 14 _ Dublin Boulevard between Golden Gate Drive and Amador Plaza Road.. 33 Village parkway between Lewis Avenue and Amador Valley Boulevard .................... 34 Collision Diagram 15 - Village parlcway between Lewis Avenue and Dublin Boulevard ....... 35 Amador Valley Boulevard between Village Parkway and York. Drive ...................... 36 Collision Diagram 16 - Dublin Boulevard between Golden Gate Drive and Regional Street . . . ., 37 Dublin Boulevard between Regional Street and Golden Gate Drive . . . . . . . . . . . . . . . . . . . . . . .. 38 Collision Diagram 17 - Dublin Boulevard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ., 39 STUDY PARTICIPANTS.. ... .., . .. .., . ... .., . . .. . .. . . ., . ., .......... ............ 40 TABLES I Traffic Accidents By Year. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 II Intersections with Three or More Accidents in a Given Year from 1994-1996 .................. 3 III Roadway Segments with Three or More Accidents in a Given Year from 1994 - 1996 . . . . . . . . . . ., 4 INTRODUCTION Each year the list of reported accidents witlùn the City of Dublin is reviewed to determine if there are serious traffic safety problems that can be corrected. The following study provides a description of the overall accident trends in the City, identifies locations where traffic safety is below average, and makes recommendations to revise traffic control to enhance vehicle safety. The study analyzes accident reports from the previous three-year period, 1994 through 1996. In summary, the 1996 traffic safety analysis has found that: · The total number of reported accidents has decreased slightly over 1995 levels, and has increased 12 percent over the previous three-year average. Six roadway segments and nine intersections were designated as high accident locations. · Improvements were identified at several intersections (many are already planned). All other high accident rate locations were found to have current and standard traffic control measures, or are currently being improved. Accident Trends The reported accidents from 1996 were totalled by severity and compared to the previous accidents totals for the years 1993 through 1995. The resulting accident trends are listed in Table I. Property damage accidents have decreased over last year. Injury accidents have increased over last year. The total number of accidents decreased 3 percent compared to the previous three-year average. Property damage-only accidents are 16 percent lower than the three-year average, while recorded injury accidents increased by 127 percent over the three-year average. (The increase in injury accidents is primarily attributable to changes in reporting by the Police Department: many "complaint of injury" accidents were listed as injury accidents in the 1996 police reports that would not have been so listed in previous years.) There was one fatal accident. Table I Number of Accidents Three- 1996 Year Average Accident Type 1993 1994 1995 Total % Change Property Damage Only 221 242 233 232 196 -16% Injury 23 20 24 22 50 + 127% Fatal 0 0 0 0 1 N/A Total Accidents 244 262 257 2S4 247 ·3% Traffic Accidents By Year 1996 Dublin Traffic Safety Study T JKM Transportation Consultants Page 1 June 12, 1997 Accident Rate Calculations The recorded accidents can be categorized as either intersection accidents or roadway segment accidents. The Institute of Transportation Engineers' Manual of Traffic Studies recommends that any accident within 100 feet of an intersection be considered an intersection accident and any accident further than 100 feet of an intersection be considered a roadway segment accident Accidents were classified using this method with one exception. Several rear-end accidents located further than 100 feet in advance of intersections were classified as intersection accidents based on review of the accident reports. The accident rates for roadway segments between intersections were calculated by Equation 1. The roadway daily volumes were taken from the 1993 Traffic Flow Map prepared by TJKM for the City. A number of these daily volumes were updated with 1994, 1995 and 1996 traffic counts. The length of a roadway segment was interpreted to be the distance (in miles) between adjoining (Eq". 1) Roadway SOB_III RiM intersections. Typically, roadway segment calculations are more appropriate for rural settings where there are longer distances between major intersections. When applied to short segments, the resulting accident rates can be artificially high compared to State averages. A ·d t R t Accidents 1,000,000 CCl en a e- ADT Miles 365 For intersections, the accident rates were calculated using Equation 2. The intersection daily volumes were taken as the sum of each approach to the intersection. These volumes were collected in 1993, 1994, 1995 and 1996. A ·d tR t Accidents 1,000,000 CCl en a e- ADT 365 (Eq". 2) lillo-Nelia" Rato The calculated accident rates were compared to the standard rates published in Caltrans' 1995 Accident Data on California State Highways. The Caltrans report contains standard rates based on roadway and intersection characteristics such as geometrics, traffic control, and area type. One method of selecting study locations for focused study is to analyze the ratio of the calculated accident rate to the Caltrans standard rate for similar facility types. Method of Selecting High Accident Locations Given the small number of accidents that occur in a given year and the potential for statistical fluctuation, a sample size of three years is generally considered to be a more reliable indication of accident trends. Therefore, Dublin accident data was analyzed for the three-year period from 1994-1996. At each location, the accident rate was calculated based on the average number of accidents per year for the three-year period. 1 ntersections Table II displays all intersections within the City at which three or more accidents occurred within a single year between 1994 and 1996. The intersections are ranked by the ratio of the three-year average accident rate to Caltrans standard accident rate. Seven intersections in this list are considered high accident locations (at which the average actual accident rate exceeds the statewide average rate. Collision diagrams, included in the "Recommendations" section of this report, were prepared for these seven intersections. 1996 Dublin Traffic Safety Study T JKM Transportation Consultants Page 2 June 12, 1997 Table n Intersections with Three or More Accidents in a Given Year from 1994-1996 Number of 1996 Data Accidents Intersection ADT '94 '95 '96 Acc. Acc. Std. Ratioc /year Rate Rateb a Hacienda Dr./Dublin Blvd. 9,850 5 2 2 3.0 0.83 0.55 1.52 Dublin Blvd./Regional St. 40,400 11 10 11 10.7 0.72 0.54 1.34 San Ramon Rd./Silvergate Dr. 14,950 4 2 2 2.7 0.49 0.39 1.25 Village Pkwy.lLewis Ave. 16,900 5 1 3 3.0 0.49 0.39 1.25 Dougherty Rd./Dublin Blvd. 51,500 10 20 7 12.3 0.66 0.54 1.22 San Ramon Rd./Dublin Blvd. 60,050 6 13 20 13.0 0.59 0.54 1.10 Donohue Dr./ Amador Valley Bl. 21,000 5 5 3 4.3 0.57 0.54 1.05 Village Pkwy./Dub1in Blvd. 30,6~ 7 5 6 6.0 0.54 0.54 0.99 Dougherty Rd./Amador Valley Bl. (2í,~ 3 3 2 2.7 0.35 0.39 0.89 - San Ramon Rd./Shannon Ave. 11,550 4 2 0 2.0 0.47 0.54 0.88 Village Pkwy./Brighton Dr. 14,000 4 3 1 2.7 0.52 0.64 0.82 Penn Dr./Amador Valley Pkwy. 10,300 0 1 4 1.7 0.44 0.55 0.81 Amador Plaza Rd./Dub1in Bl. 27,350 2 4 7 4.3 0.43 0.54 0.80 Golden Gate Dr./Dublin Blvd. 24,200 7 1 3 3.7 0.42 0.54 0.77 Amador Plaza Rd./ Amador Valley Bl. 23,050 3 3 1 2.3 0.28 0.39 0.71 Regional St./Amador Valley Bl. 19,750 4 2 2 2.7 0.37 0.54 0.69 San Ramon Rd./Amador Valley Blvd. 34,800 4 4 6 4.7 0.37 0.54 0.68 Stagecoach Rd./ Amador Valley Blvd. 12,900 4 0 1 1.7 0.35 0.54 0.66 Village pkwy./Amador Valley Bl. 31,100 3 3 5 3.7 0.32 0.54 0.60 Dougherty Rd./WB 580 Ramps Bl. 60,100 6 7 7 6.7 0.30 0.54 0.56 Dougherty Rd./Sierra Ln. 28,050 4 3 2 3.0 0.29 0.19 1.54 a. The accident rate is measured in accidents per million vehicles for intersection. b. Accident rates are categorized on the basis of facility size, configuration, type of control and area density. All intersections are in the "Suburban" category. c. Ratio = actual calculated rate/Caltrans' standard rate. Roadway Segments Table III is similar to Table II except that it contains data for the roadway segments. Again, any segment where three or more accidents occurred in any given year between 1994 and 1996 is included. Eleven roadway segments were identified as having an actual accident rate higher than the statewide average rate. described below. Collision diagrams were prepared for these twelve segments and are included in the "Recommendations" section of this report. 1996 Dublin Traffic Safety Study T JKM Transportation Consultants Page 3 June 12, 1997 0 CO \0 t- t- M 0\ t- 'p CO CO t- t- t- 10 "<:t CIS 0 0 0 0 0 0 Ó ~ Ë ~ Cf"! 0 Cf"! 0 0 0 0 q 0 Cf"! 0 0 Cf"! ..... q M "<:t 0 en ~ ...... M ...... N N N N N N M N N M N M M N c-4 u B t- M N ..... 0\ CO CO 0 0\ N 8 \0 "<T "<T N N ...... 10 N U CIS ~ 0 co N "1 "1 M 0\ \0 ~ r--: co "1 M "<T ~ 0\ <: ~ co ...... M ...f M M M N N M N ..... N ...... N N ...... 0 - ~ ...: t- M M t- M 8 M ~ t- M t- t- ~ t- 8 8 t- M 8 ~ \0 Cf"! M \0 M M \0 M \0 \0 \0 \0 M <: N ...... N ...f N \Ó ...... M N N ...f N ..... N N M N N ~ \0 0 'V M 'V 'V 'V \0 N 0 ?' M ...... N ...... ..... M M M M 0 "Q 'Q U < 10 ...... ?' N M M 'V N 00 0 ...... N N \0 M 0 10 0 "<T "<T 'V 0 'Ie ... c:I'\ .8 c:I'\ .-4 ~ ?- M ...... M \0 N \0 0 'V "<T 'V N 'V 0 0 M M ...... M '<:I' c:I'\ c:I'\ .-4 S ~ t- N ...... 0 ...... t- 10 ..... ~ N \0 ~ 10 N 8 co 00 M t- ~ co 0\ t- M N 0\ 10 M \0 00 "<T Q 'V 10 ~ r--:. 10 q co t- oq, M ...... t- M ~ ..... t- J:: co M ...... M ...... ..,¡ ...... Ñ Ñ ...... 'l5 ..,¡ 0\ ..,¡ Ñ M 10 'l5 ; cu fo ~ ......... § 0 0 0 8 10 0 8 0 8 0 0 0 0 0 8 8 8 <t:! 10 N 10 10 10 10 10 = C 10 ~ 10 q 10 10 C'! q q C'! ~ ..... cu j '-"' \0 0\ 10 \0 \0 co co 10 t- ~ ...... ...... ...... ...... ...... ..... ..... ..... ...... a œ ~ 0 8 0 8 8 0 0 0 ~ 8 § ~ 0 § 8 ~ ~ ~ "5 10 10 10 10 10 10 'Vþ 0\ <"l 0\ oq, \0 t- 0\ M co ~ ~ < 'V Ñ 10 'l5 co M oÖ ..,¡ 'l5 Ñ r-: ó ..,¡ ó co 10 ~ Ó - ...... ...... N N ..... ..... N N N M 10 = cu ~ "a -d >. ~ ð -< ~ ~ cu ~ ...: ... -d C .¿ -d 0 Q 0 Q ~ ~ ~ ::g ~ z ~ ...: ~ ...... CIS ~ 0 a ~ ... ~ ~ 8 ~ ...: > 8 0 Q C ¡:¡:: >. ~ Q ~ .... cu :§ 0 .¿ 0 0 0 0 ëñ en ~ C .... 0 ~ 0 ~ ... ~ 0 B .... ~ ~ 8 0 ~ ...... 'C 0 ~ ~ ~ -d < ~ ~ 0 "Q > CIS ~ en 9 c CIS ~ CIS 0 0 0 ~ -d en ~ C ~ ... .... 9 .¿ '6'0 ~ 9 ~ ~ .~ ~ 0 0 >. 5 ~ ~ ø:: ...... -= 0 § "Q ...: d 0 ~ - .¿ ~ >. ~ CIS ~ "Q ~ ~ "Ii 0 0 ~ 0 u 0 ....:¡ 9 ~ ..... ø:: c ~ ~ 0 è 9 'S; ..... en :I: >. :.= {IJ ~ 0 0 ...: 0 ... c 0 "8 .... ,J:J - 9 > .... 9 .... a 0 0 =æ .¿ u = ;3 0 0 ;3 l! 8 >. .¿ >. .... ~ .¡:: ~ ~ ~ d ... .... CIS bl) > Eo-< 9 0 ~ en ] ~ 0 0 ~ .... ~ "Q ~ ~ :> en .¡:: ... ;3 c 0 ;3 > c CIS ~ ~ ~ 0 ~ 0 0 cu ~ ~ '; "i ~ ;> 0 VJ ... ~ .5 .... 0 c 5 en § <: CO >. 0 ~ ~ bO 0 .~ -d § .¿ .¿ ~ ø::: 10 ; ~ CIS 'ë "Q ~ .... ~ ~ ...:I ~ I ..c -d ~ :::= ..... ~ bO fä - s 8 0 ~ 0 ~ ¡:Q ê CIS ~ en ~ .¿ :> 0 ~ .¿ en 0 .¿ œ < >. >. >. Q '5 0 CIS >. ~ ~ 0 0 0 ø::: 0 ~ ~ .¿ .¿ .¿ ~ .¿ ~ ~ .... .¿ .¿ ø:: .... ~ ~ c c en c ß en 6: ~ 0 ~ ~ ~ ~ > ~ > > 0 ~ ~ 0 Š '; c ~ ~ ¡:Q :Q ¡:Q ~ .... :Q ¡:Q ~ 0 ... ... ... ... U en c ~ 0 0 c c c 0 0 c 0 0 c c ~ 0 "Q ~ ~ :.= :.= :.= ~ "Q :.= "Q ~ ø::: ~ :ã ;.:::: ~ cu '5'0 CIS CIS CIS t:: :E ~ :::= fä .D .D .D :::= ~ .c ~ ~ ã .D ã ~ ~ ..c :> 8 8 8 :> 8 0 8 8 œ en en VJ ëñ en Eo-< RECOMMENDATIONS Intersection Traffic Safety Improvements 1. Hacienda Drive and Dublin Boulevard (Collision Diagram 1) The two accidents that occurred at this intersection in 1996 involved vehicles travelling westbound on Dublin Boulevard failing to stop at the STOP sign. A traffic signal is planned to be installed at this intersection in the near future. Recommendations: Pursue the planned traffic signal installation at the intersection. 1996 Dublin Traffic Safety Study T JKM Transportation Consultants Page 5 June 12, 1997 ACC 1 2 DATE 02-15-96 05-1 2-96 TIME 20 :00 D 14:44 L . ....... . ., . , ... ....,'. ............... .'.·.··'.i....·. ^ - .. . . . . . .. . ,.. , ....,." .,.....,.. .........'......., ........ .... . ... ... ...,'.,. .. ..... .. .... ... .. . I··· . ... · . .. I . . . , . I·', " ,. · ... .... .. . · . . . . .. . . . . . ... . . ... ,.. ... - , \ - . .. \ '- . .,.. . . . ., .. . . , .. . ..·.·.1 . > >'... ..,...., ..."..., ..'.' .. . \.... .. ... ..: C t I ' ~ .. ,. ,I . ,.... . ... ........ .. . . . . .. . . I ...... ... .. .. , Collision Diagram [!] 157·001T8· 6197· NA LEGEND: y -cr --+()--+ -0- :0 . () . ~BIKE ~ (L) (D) o o ~ . D> ~ . ... . . .....................,..... .. ......... .'... ... . Right Angle Left Turn Rear-End Head-On Side Swipe, Rear-End Side Swipe, Head-On Pedestrian, Bicycle Backing Daylight Darkness Property Damage Fixed Object Injury Fatal Parked Car Out of Control Dublin Blvd. . ..'.' CITY OF DUBLIN LOCATION: Hacienda Dr. and Dublin Blvd. PERIOD COVERED: 01-01-96 to 12-13-97 DATE COMPILED: 04-11-97 íì ~ North 2. Dublin Boulevard and Regional Street (Collision Diagram 2) A total of eleven accidents were reported at this location in 1996. Five of these were right-angle accidents, one was a sideswipe accident, and the remaining were rear-end collisions. Of the five right-angle accidents reported at this intersection in 1996, one accident involved a northbound left-turning vehicle striking a southbound through vehicle. This type of accident will be virtually eliminated in the future as the intersection has been modified to provide protected left-turn phasing on the northbound and southbound approaches. The remaining four reported accidents were related either to unsafe lane changing or turns. During 1996 there were five rear- end accidents reported at this intersection; rear-end accidents are not uncommon at signalized intersections and are usually attributable to driver inattention. However, the intersection and signal were under construction for a significant portion of 1996; it is expected that the accident rate will decrease now that the intersection is no longer within a construction zone. Also, the intersection has been widened to provide additional travel lanes, and, as mentioned above, the signal phasing has been enhanced to improve safety. Analysis of all of the accidents during the year 1996 reveals no discernible accident pattern. Recommendations: Continue to monitor the intersection. 1996 Dublin Traffic Safety Study T JKM Transportation Consultants Page 7 June 12, 1997 ACC 1 2 3 4 5 6 7 8 LEGEND: j:= -0- -0+- : () 4 0 . ~IKE ~ (L) (D) o o ~ . D> Right Angle Left Turn Rear-End Head-On Side Swipe, Rear-End Side Swipe, Head-On Pedestrian, Bicycle Backing Daylight Darkness Property Damage Fixed Object Injury Fatal Parked Car Out of Control ~ CITY OF DUBLIN LOCATION: Dublin Blvd. and Regional St. PERIOD COVERED: 01-01-96 to 12-13-96 DATE COMPILED: 04-11-97 Collision Diagram [i] 157-OO1T8 - 2197· NA íì ~ North 3. San Ramon Road and Silvergate Drive (Collision Diagram 3) Of the two accidents that occurred in 1996, both were rear-end collisions. Rear-end accidents are not uncommon at signalized intersections and are usually attributable to driver inattention. These accidents were not on the same approach, so no accident pattern is discernible. The annual number of accidents at this intersection declined from 4 in 1994 to 2 in 1995 and 2 in 1996. Recommendations: None. 1996 Dublin Traffic Safety Study T JKM Transportation Consultants Page 9 June 12, 1997 ACC 1 2 Silvergate Dr. LEGEND: k -0- -0- : () ~ ~ () --: ~IKE ~ (L) (0) o o ø . 0> ~ Right Angle Left Turn Rear-End Head-On Side swipe. Rear-End Side swipe, Head-On Pedestrian, Bicycle Backing Daylight Darkness Property Damage Fixed Object Injury Fatal Parked Car Out of Control CITY OF DUBLIN ..¿ a:: c: o E co a:: c: co en LOCATION: San Ramon Rd. and Silvergate Dr. PERIOD COVERED: 01-01-96 to 12-13-96 DATE COMPILED: 04-11-97 Collision Diagram W 157.001T8 - 6197· NA g ~ North 4. Village Parkway and Lewis Avenue (Collision Diagram 4) Of the three accidents that occurred at this intersection in 1996. two were rear-end collisions and one involved a tree being struck by truck. Rear-end accidents are not uncommon at signalized intersections and are usually attributable to driver inattention. Analysis of all of the accidents at this intersection over the past three years reveals no discernible accident pattern. Recommendations: None. 1996 Dublin Traffic Safety Study T JKM Transportation Consultants Page 11 June 12, 1997 ACC 1 2 3 DATE 01-26-96 10-26-96 11-08-96 TIME 16:00 L 17:18 L 1:00 L LEGEND: -Z= -0- -0-- : () « () . ~IKE ----+(Y«+ (L) (D) o o ~ . 0> ~ Right Angle Left Turn Rear-End Head-On Side Swipe, Rear-End Side Swipe. Head-On Pedestrian, Bicycle Backing Daylight Darkness Property Damage Fixed Object Injury Fatal Parked Car Out of Control CITY OF DUBLIN ~ ~ a.. Q C'I ~ :;: LOCATION: Village Pkwy. and Lewis Ave. PERIOD COVERED: 01-01-96 to 12-13-96 DATE COMPILED: 04-11-97 Collision Diagram W 157-001T8· 4/97· NA ¡¡ ~ North 5. Dougherty Road and Dublin Boulevard (Collision Diagram 5) Of the seven accidents that occurred at this intersection in 1996, three were rear-end accidents, two were right-angle and two were related to unsafe lane changing. Rear-end accidents are not uncommon at signalized intersections and are usually attributable to driver inattention. Analysis of all of the accidents at this intersection over the past three years reveals no discernible accident pattem. The aIlllual number of accidents at this intersection dropped sharply in 19%. In fact, if 1996 alone were used to calculate the accident rate, the intersection would be well below the statewide average. With recent redesigns of the gas stations on the northwest and southwest comers, driveways have been pulled further back from the intersection, resulting in fewer accidents related to vehicles exiting the driveways. Recommendations: None. 1996 Dublin Traffic Safety Study T JKM Transportation Consultants Page 13 June 12, 1997 ACC 1 2 3 4 5 6 7 -Z= -0- -0- = () . () . ~IKE ~ (L) (D) o o ~ . 0> LEGEND: ~ Right Angle Left Turn Rear-End Head-On Side Swipe. Rear-End Side Swipe. Head-On Pedestrian, Bicycle Backing Daylight Darkness Property Damage Fixed Object Injury Fatal Parked Car Out of Control CITY OF DUBLIN LOCATION: Dougherty Rd. and Dublin Blvd. PERIOD COVERED: 01·01·96 to 12-13-96 DATE COMPILED: 06-11-97 Collision Diagram W 157·001T8· 6197· NA .. ~ North 6. San Ramon Road and Dublin Boulevard (Collision Diagram 6) Of the 20 accidents that occurred at this intersection in 1996, 6 were rear-end collisions, 3 involved left-turning vehicles, 2 were sideswipe accidents, 4 involved unsafe lane changing, 3 were right-angle collision, one involved out of control vehicle and one involved a collision with fixed object. The three reported accidents involving left-turning vehicles were caused either by motorists not yielding to oncoming vehicles having right-of-way or by motorists running red lights. Rear-end accidents are not uncommon at signalized intersections and are usually attributable tQ driver inattention. Analysis of all of the accidents at this intersection over the past three years reveals no discernible accident pattern. This intersection was under construction for a significant portion of 1996. The accident pattern is influenced by these activities. The intersection is now operating with improved geometrics and signal phasing; it is expected that the improved condition will lead to a decline in accident rates. Recommendations: Continue to monitor the intersection. 1996 Dublin Traffic Safety Study TJKM Transportation Consultants Page 15 June 12, 1997 ACC TIME 15:15 L 19 :45 0 12 :05 L 13 :00 L 21:45 0 14:20 L 19 :00 0 08:15 L 17:50 L 14:10 L 10:55 L 15:45 L LEGEND: j: -0- -0- : () °0 ~IKE ~ (L) (D) o o ~ . D> ~ Right Angle Left Turn Rear-End Head-On Side Swipe, Rear-End Side Swipe, Head-On Pedestrian, Bicycle Backing Daylight Darkness Property Damage Fixed Object Injury Fatal Parked Car Out of Control CITY OF DUBLIN 'C a: I: o E co a: I: co (J) LOCATION: Dublin Blvd. and San Ramon Rd. PERIOD COVERED: 01-01-96 to 12-13-96 DATE COMPILED: 04-11-97 Collision Diagram ~ 157·001T8· 6197· NA ¡¡ ~ North 7. Donohue Drive and Amador Valley Boulevard (Collision Diagram 7) There were three reported accidents at this location in 1996. One involved an unsafe turning movement, one involved very excessive speed, and one was a rear-end collision. Analysis of all of the accidents during the previous three years reveals no discernible accident pattern. Recommendations: None 1996 Dublin Traffic Safety Study TJKM Transportation Consultants Page 17 June 12, 1997 ACC 1 2 3 DATE 12-06-96 12-17-96 12-20-96 TIME 14 :20 L 16:05 L 20:12 D LEGEND: ~ --0- -0-- ~ () .. () . ~IKE ~ (L) (D) o o @ . [þ ~ Right Angle Left Turn Rear-End Head-On Side Swipe. Rear-End Side Swipe, Head-On Pedestrian, Bicycle Backing Daylight Darkness Property Damage Fixed Object Injury Fatal Parked Car Out of Control CITY OF DUBLIN LOCATION: Amador Valley Blvd./Donohue Dr. PERIOD COVERED: 01-01-96 to 12-13-96 DATE COMPILED: 04-11-97 Collision Diagram [1] 157.oo1T8 ·4-97· NA íì ~ North Roadway Segment Traffic Safety Improvements 1. Regional Street between Amador Valley Boulevard and Dublin Boulevard (Collision Diagram 8) Of the four accidents that occurred on this facility in 1996, two involved parking vehicles striking fixed objects, one involved an illegal backing maneuver, and one was a sideswipe between two vehicles entering the same driveway. Recommendations: None. 1996 Dublin Traffic Safety Study TJKM Transportation Consultants Page 19 June 12, 1997 ACC 1 2 3 4 DATE 03-29-96 04-04-96 04-19-96 07 -28-96 · . ..:' . . .. .. . . ·.1 ...:, ·>1 · ... . .. .. . ... · . .. . . Dublin Blvd. . ... . -.<.. .'...'... · .. . . . . . . .. TIME 13:30 L 16:30 L 12 :45 L 11 :15 L Amador Valley Blvd. . .... ... '. . .. .., '.,. . ......: ..'.... .. .. .,. .. ,. · . . .. . . . .. . . ... . . . .. . :, . .'.. ...., :... ... · ..:. ,. . . ,.. · .. . .. '.: . ..., ~ .. :. OJ.·· .. ~.... ì .. .. ... ' . .: . .. ... ..... . . , ,..... .... ... . .. ,. . ,. . ·1 · ... .. :·····'1 1. [ . · ..'... .... ..: :. . en ... : .. . I . .. . . .. , .. .. ~ J:: o '511> Q) a: . Collision Diagram [¡] 157.Q01T8· 6-97· NA LEGEND: -Z= -0- -0-- : () ~ ~IKE ~ (L) (D) o o ~ . D> '2IV4 Right Angle Left Turn Rear-End Head-On Side Swipe, Rear-End Side Swipe, Head-On Pedestrian, Bicycle Backing Daylight Darkness Property Damage Fixed Object Injury Fatal Parked Car Out of Control CITY OF DUBLIN LOCATION: Regional St. between Amador Valley Blvd. and Dublin Blvd. PERIOD COVERED: 01-01-96 to 12-13-96 DATE COMPILED: 05-01-97 ---:- ¡¡ ~ North 2. Shannon Avenue between Shannon Court and San Ramon Road (No Collision Diagram) No accidents were reported on this segment in 1996. Therefore, no recent accident pattern exists. Recommendations: None. 1996 Dublin Traffic Safety Study T JKM Transportation Consultants Page 21 June 12, 1997 3. Amador Plaza Road between Amador Valley Boulevard and Dublin Boulevard (Collision Diagram 9) Only one accident was reported on this road segment in 1996. related to an unsafe tum Accidents in previous years have been related to unsafe and/or illegal turning movements at various locations along Amador Plaza Road. No pattern has been discernible. Amador Plaza is fronted by many driveways. A two-way left-turn lane is provided for movements to and from these driveways. Recommendations: None. 1996 Dublin Traffic Safety Study T JKM Transportation Consultants Page 22 June 12, 1997 ACC 1 DATE 10-18-96 TIME 12:251l) Amador Valley . ':. .,' . . . . .. · . · . . .:. . .. . . ., · . · .. . · . .. · . Blvd. .. . " · ....' . · · : . · . "C a: ns , . ,.: N · .. · ~ · . c.. ~ 1< . . · E I... .. . < 1'< I.. . · çJ:5 . . . · · . . . . .. .. . . .. '...". · · Dublin Blvd. .. .. .. .,.........., . ...... :....... :,. .. . · .......... ..' ... '.. . ... .....:' ',.'. . LEGEND: j: -0- -0- : () . () . ~BIKE ~ (L) (D) o o ~ . D> ~ Right Angle Left Turn Rear-End Head-On Side Swipe, Rear-End Side Swipe, Head-On Pedestrian, Bicycle Backing Daylight Darkness Property Damage Fixed Object Injury Fatal Parked Car Out of Control CITY OF DUBLIN LOCATION: Amador Plaza Rd. between Amador Valley Blvd. and Dublin Blvd. PERIOD COVERED: 01-01-96 to 12-13-96 DATE COMPILED: 05-01-97 Collision Diagram [i] 157-OO1T8 ·6-97· NA ¡¡ ~ North 4. Village Parkway between Lewis Avenue and Dublin Boulevard (Collision Diagram 9) Of the four accidents that occurred on this facility in 1996. one was an unsafe lane change. one was related to vehicles exiting a driveway and two were rear-end collisions related to vehicles entering driveways. All driveways on this segment are right-in/right-out only; the four-lane road is divided by a landscaped median. No discernible accident pattern is evident. The annual number of accidents on this segment decreased from 6 in 1994 to 4 in 1995 and 4 in 1996. Recommendations: None. 1996 Dublin Traffic Safety Study TJKM Transportation Consultants Page 24 June 12, 1997 ACC 1 2 3 4 DATE 01-17-96 02-17-96 02-20-96 04-17-96 TIME 12:25 L 11 :45 L 12:37 L 18 :00 L J LEGEND: -Z= -0- -0- :0 . () . ~IKE ~ (L) (D) o D @ . D> Lewis Ave. ~ ~ Q.. (1) C) ~ :> ~ Right Angle Left Turn Rear-End Head-On Side Swipe, Rear-End Side Swipe, Head-On Pedestrian, Bicycle Backi ng Daylight Darkness Property Damage Fixed Object Injury Fatal Parked Car Out of Control CITY OF DUBLIN Collision Diagram \101 157-OO1T8 - 6·97· NA LOCATION: Village Pkwy. between Lewis Ave. and Dublin Blvd. PERIOD COVERED: 01-01-96 to 12-13-96 DATE COMPILED: 05-01-97 .. ~ North 5. San Ramon Road between Bellina Street and Alcosta Boulevard (Collision Diagram 11) Of the three accidents that occurred on this facility in 1996, two involved vehicles striking fixed objects, and one involved a vehicle following too closely. San Ramon Road carries six lanes with travel directions separated by a solid median. No discernible accident pattern is evident. It should be noted that construction activity has been occurring at the intersection of San Ramon Road and Alcosta Boulevard during 1996 and 1997. Recommendations: None. 1996 Dublin Traffic Safety Study T JKM Transportation Consultants Page 26 June 12, 1997 ACC 1 2 3 DATE 04-22-96 04-27-96 10-24-96 TIME 17:15 L 03 :50 D 17:05 L LEGEND: -Z= -0----. --0- = () . () . ~IKE ~ (L) (D) o o @ . D> ~ Right Angle Left Turn Rear-End Head-On Side Swipe, Rear-End Side Swipe Head-On Pedestrian, Bicycle Backing Daylight Darkness Property Damage Fixed Object Injury Fatal Parked Car Out of Control CITY OF DUBLIN San Ramon Rd. between Bellina St. and Alcosta Blvd. PERIOD COVERED: 01-01-96 to 12-13-96 DATE COMPILED: 06-11-97 Collision Diagram [1!] 157-00118·6·97· NA íì ~ North 6. Dublin Boulevard between Village Parkway and Clark Avenue (Collision Diagram 12) Of the four accidents that occurred on this facility in 1996, three involved rear-end collisions by speeding or inattentive motorists following too closely, and one involved a motorist exiting a driveway striking a bicyclist who was riding on the wrong side of the road. Although three of these accidents have the same cause, they all occurred at different locations with vehicles making different movements, so no accident pattern is discernible. Historically, many of the accidents on this segment have been related to vehicles rear-ending other vehicles that were slowing to enter driveways or were stopped at the signal at Village Parkway. This four-lane segment has numerous driveways and a two-way left-turn lane, and such accidents are not uncommon on segments with similar characteristics. It should be noted that the number of accidents reported in 1996 (4) was significantly lower than the number reported in 1995 (8) and 1994 (6). It should be noted that a portion of Dublin Boulevard near Village Parkway was widened and restriped during 1996. It does not appear that the construction wne contributed to any of the reported accidents. Recommendations: Continue to monitor this segment. 1996 Dublin Traffic Safety Study T JKM Transportation Consultants Page 28 June 12, 1997 ACC 1 2 3 4 DATE 08-14-96 08-27 -96 08-29-96 11-1 6-96 TIME 14 :25 L 10:50 L 15 :20 L 09 :20 L LEGEND: ~ -0- -0- : () 4 () . ~IKE ~ (L) (D) o o ~ . D> ~ Right Angle Left Turn Rear-End Head-On Side Swipe. Rear-End Side Swipe I Head-On Pedestrian, Bicycle Backing Daylight Darkness Property Damage Fixed Object Injury Fatal Parked Car Out of Control CITY OF DUBLIN Dublin Blvd. between Village Pkwy. and Clark Ave. PERIOD COVERED: 01-01-96 to 12-13-96 DATE COMPILED: 06-11-97 Collision Diagram \121 157-OO1T8 - 6-97· NA (I ~ North 7. Dublin Boulevard between Hansen Drive and Donlon Way (Collision Diagram 13) Of the three accidents that occurred on this facility in 1996. one involved unsafe lane changing, one involved a parked motorist opening a car door in the traffic lane, and one involved a right- angle collision with a vehicle exiting a driveway. The right-angle collision was due to the blocking of sight distance by parked cars along curbside. Recent restriping of this area of Dublin Boulevard has created an additional westbound lane on this segment; the lane becomes a "trap" right-turn lane at Hansen Drive. Urisafe lane changes have been occurring because motorists become aware of the "trap" lane and try to merge left in advance of Hansen Drive. The City is in the process of providing additional advance warning signs and painted arrows to warn motorists earlier. TJKM has detelUlined that the intersection of Dublin Boulevard and Hansen Drive warrants signalization. The City Council has authorized this signalization in addition to interim all-way STOP control and sight distance improvements. Recommendations: Provide additional warning of the "trap" lane for westbound motorists on Dublin Boulevard. Pursue the installation of traffic signals and interim all-way STOP sign control at Dublin Boulevard and Hansen Drive. 1996 Dublin Traffic Safety Study TJKM Transportation Consultants Page 30 June 12, 1997 -c > ã5 s:: J:I :J C I.······..·..··· ...., w ....... , .> .. . ..... ·1. . .:. .: ... ····1 ,I.· .. ... I '.1 .. - ).. ... .. ..... . . ...... ... Dublin Blvd. between .. ..... . Hansen Dr. and Donlon Wy. .. .. PERIOD COVERED: ... . .. 01-01-96 to 12-13-96 ..... DATE COMPILED: 05·01·97 ... ..... L-- . ... . . . .. ... .... ... ACC DATE TIME LEGE ND: 1 01-22-96 07:50 L -Z= 2 05-02-96 07:55 L 3 06-28-96 07 :50 L 4 09-07-96 14:20 L -0- -0- : () . .. ~ ~IKE . .~11\ ~ (L) .. . .. . Donlon Wy. (D) . . .... ........ ... 0 .. . ....... 0 . ... @ .. . . ~ .. t-- [þ .. . ....... ~ .... ... .. ... : .... . . .: . . ............. .... .. .. . ....\ . ........ . . . ..... ....... ... ... .. . .. .. .. . . .. ......... ... ... ... ........... >.. . ...... . . Right Angle Left Turn Rear-End Head-On Side Swipe, Rear-End Side Swipe, Head-On Pedestrian, Bicycle Backing Daylight Darkness Property Damage Fixed Object Injury Fatal Parked Car Out of Control CITY OF DUBLIN LOCATION: Hansen Dr. r-···...·..······ ... Collision Diagram \131 157-OO1T8 . 6·97 . NA ~ ~ North 8. Dublin Boulevard between Golden Gate Drive and Amador Plaza Road (Collision Diagram 14) Of the four accidents that occurred on this facility in 1996, one involved a vehicle slowing to enter a driveway getting rear-ended, and three were rear-end accidents caused by vehicles following too closely. These last three were primarily related to driver inattention, and are not likely to be correctable by any street improvements. It should be noted that, during 1996, this segment of Dublin Boulevard was restriped from four lanes to six. Recommendations: Continue to monitor this segment under the new configuration. 1996 Dublin Traffic Safety Study T JKM Transportation Consultants Page 32 June 12, 1997 ACC 1 2 3 4 DATE 01-09-96 01-10-96 03-09-96 12-31-96 TIME 12:30 L 13:00 L 10:30 L 13:10 L .¿ ~ cc c: :ë ::J C LEGEND: ~ -()--+ -0- : () 4 () . ~IKE ~ (L) (D) o o ~ . D> ~ Right Angle Left Turn Rear-End Head-On Side Swipe, Rear-End Side Swipe, Head-On Pedestrian, Bicycle Backing Daylight Darkness Property Damage Fixed Object Injury Fatal Parked Car Out of Control CITY OF DUBLIN Collision Diagram 1141 157.oo1T8 - 6·97 - NA LOCATION: Dublin Blvd. between Golden Gate Dr. and Amador Plaza Rd. PERIOD COVERED: 01-01-96 to 12-13-96 DATE COMPILED: 06-11-97 aI ~ North 9. Village Parkway between Lewis Avenue and A.rno.dor Valley Boulevard (Collision Diagram 15) Of the two accidents that occurred on this facility in 1996, one was a rear-end collision caused by a motorist following too closely, and the other was caused by a vehicle pulling out of a driveway directly in front of another vehicle. All driveways on this segment are right-in/right- out only; the four-lane road is divided by a landscaped median. No discernible accident pattern is evident. The annual number of accidents on this segment decreased from 4 in 1994 to 2 in 1995 and 2 in 1996. Recommendations: None. 1996 Dublin Traffic Safety Study TJKM Transportation Consultants Page 34 June 12, 1997 ACC 1 2 DATE 05-07-96 08-1 6-96 TIME 18:30 L 12:15 L LEGEND: j:= -0- -0- : () . () . ~IKE ~ Amador (L) Valley Blvd. (D) o o ~ . D> ~ Right Angle Left Turn Rear-End Head-On Side Swipe, Rear-End Side Swipe, Head-On Pedestrian, Bicycle Backing Daylight Darkness Property Damage Fixed Object Injury Fatal Parked Car Out of Control CITY OF DUBLIN LOCATION: Village Pkwy. between Lewis Ave. and Amador Valley Blvd. PERIOD COVERED: 01-01-96 to 12-13-96 DATE COMPILED: 06-11-97 Collision Diagram 1151 157-00118·6-97· NA íì ~ North to. Amador Valley Boulevard between Village Parkway and York Drive (Collision Diagram 16) The accident that occurred on this facility in 1996 was a rear-end collision involving a merging vehicle. No accident panem is discernible on this segment. The number of accidents on this segment has steadily decreased over the past three years. Recommendations: None. 1996 Dublin Traffic Safety Study T JKM Transportation Consultants Page 36 June 12, 1997 -.- ACC DATE 1 03-31-96 TIME 18:20 L LEGEND: -Z= -0- -0- : () " () . ~IKE ~ (L) (D) o o @ . 0> ~ Right Angle Left Turn Rear-End Head-On Side Swipe, Rear-End Side Swipe, Head-On Pedestrian, Bicycle Backi ng Daylight Darkness Property Damage Fixed Object Injury Fatal Parked Car Out of Control CITY OF DUBLIN LOCATION: Amador Valley Blvd. between Village Pkwy. and York Dr. PERIOD COVERED: 01-01-96 to 12-13-96 DATE COMPILED: 06-11-97 Collision Diagram \16\ 157'((1T8 ·6-97· NA ~ ~ North 11. Dublin Boulevard between Regional Street and Golden Gate Drive (Collision Diagram 17) Of the six accidents that occurred on this facility in 1996, two involved buses pulling from a bus stop striking another bus, two involved vehicles pulling from a driveway in front of oncoming vehicles, one involved a rear-end collision by an inattentive driver, and one involved a vehicle - turning into a driveway from the middle of three lanes - being struck by a vehicle in the curb lane. Because of the recent opening of the BART station in Dublin, certain bus lines have been relocated from Dublin Boulevard. The remaining lines will soon be relocated to stops on other streets such as Regional Street. The removal of bus stops from this segment will improve both vehicular and pedestrian safety near the current stop locations. Some of the 1995 accidents were also related to vehicles exiting driveways. There are several driveways on this segment of Dublin Boulevard; such accidents are common on similar segments with high traffic volumes. It should be noted that, during 1996, this segment of Dublin Boulevard was restriped from four lanes to six. Recommendations: Continue to monitor this segment under the new configuration. 1996 Dublin Traffic Safety Study T JKM Transportation Consultants Page 38 June 12, 1997 ACC DATE TIME 1 01-02-96 13:30 L 2 01-20-96 19:33 0 3 02-05-96 12:40 L 4 03-08-96 14:45 L 5 08-05-96 18 :00 L 6 09-03-96 12:20 L Regional St. I ... . .. . J, I· . I [ ,v . .. .. I -0 > iñ t: :ë ::J C .' .. 3 v:.. . .... . .1 .... '. " 5 . ....... .1 .'. .1'·· .... . Collision Diagram 1171 1S7-OO1TB - 6-97 - NA . .... · · · . . .. .......... .... . . .. . · .... ..... .... .,. . · ( . .... .... i . . jJ · . .... . '6. . ... . I I .. ........ ....... .... ... .. ..... . . . ... . I ... .... .1···· . I .. . . . . . .... . . . .... . .. .... . LEGEND: -Z= -0- -0- :0 4 () . ~IKE ····I....~ i ~olden Gate (L) Dr. (D) o o @ . 0> "VIII- Right Angle Left Turn Rear-End Head-On Side Swipe, Rear-End Side Swipe. Head-On Pedestrian, Bicycle Backing Daylight Darkness Property Damage Fixed Object Injury Fatal Parked Car Out of Control CITY OF DUBLIN Dublin Blvd. between Regional St. and Golden Gate Dr. PERIOD COVERED: 01-01-96 to 12-13-96 DATE COMPILED: 06-11-97 ....... .. . ........... ..... ~ ~ North STUDY PARTICIPANTS Christopher S. Kinzel Nayan S. Amin Geri Foley Ruth Huycke-McCall Project Manager Project Engineer Graphics Designer Word Processor 1996 Dublin Traffic Safety Study T JKM Transportation Consultants Page 40 June 12, 1997