HomeMy WebLinkAbout7.1 Dublin Blvd. Traffic Study sqo -ffo
CITY OF DUBLIN
AGENDA STATEMENT
CITY COUNCIL MEETING DATE: March 12 , 1984
SUBJECT Dublin Boulevard Traffic Study
EXHIBITS ATTACHED Notice to Dublin Boulevard frontage owners
Summary of Study
Dublin Boulevard Traffic Study Report
Copy of proposed plan line improvements
Copy of DKS letter regarding Shell site at San Ramon Rd.
RECOMMENDATION 1 . Hear staff report.
2 . Open discussion to public .
Tok- 3 . Set a public hearing for Plan Line adoption (4/9/84 )
4 . Take action on Shell request at San Ramon Road for
additional driveway.
FINANCIAL STATEMENT: Improvements will be estimated for incorporation into
the 5 year Capital Improvement Program
DESCRIPTION This study has been undertaken at the direction of the
City Council as part of the 1983-84 capital budget to determine
deficiencies of and remedies for the Dublin Boulevard configuration as
it relates to traffic . Improvements identified and approved by Council
will be included in this years update of the 5 year Capital Improvement
Program.
This meeting is to be informational especially to the
property owners fronting Dublin Boulevard and to elicit public feedback.
As this is the only major street that will probably require right-of-
way acquisitions and the fact that access in and out of several parcels
may be altered, this study session is being held in advance of the
Public Hearing.
The recommended month between this meeting and the _
Public Hearing will give the property owners and tenants time to review
plans at City Hall and inform themselves of the proposed improvements .
As to the Shell Station request for an additional
access from Dublin Boulevard or San Ramon Road, staff is recommending
against this request from a traffic safety standpoint. However, staff
has reviewed the site for the most feasable location and found it to
be on San Ramon Road.
To add this San Ramon Road driveway would require
removal of the free right turn at the subject corner together with
attendant signal modifications . The applicant ' s traffic engineer
has estimated these improvements to be in the $50, 000 to $60, 000
range. Also, as the State originally purchased access rights, these
rights should be purchased back by the applicant. If it is the
Council ' s desire to allow this access, staff will draft up an agreement
with the applicant as to payment for the improvement modifications
and cover the possibility that should this change be determined not to
work, that the applicant pay for restoring the corner to its previous
configuration.
----------------=-----------------------------------------------------------
ITEM NO. COPIES TO: Shell Station
Leasee
•j
CITY OF DUBLIN
P.O. Box 2340
Dublin, CA 94568 (415) 829-4000
NOTICE TO DUBLIN BOULEVARD FRONTAGE OWNERS
DUBLIN BOULEVARD TRAFFIC STUDY
Dear Property Owner :
The City Council of Dublin will be holding a study session on
Monday, March 26 , 1984 at 7 : 30 p.m, in the Dublin Library to hear
results and recommendations of a traffic study of Dublin
Boulevard. You are invited to attend, hear the presentation, ask
questions, and make comments ,
The Council will set a formal public hearing date sometime during
the month of April to incorporate ultimate improvement
configurations into a road plan line, so that needed capital
improvements to the street can be planned in an orderly manner,
and serve the present and future traffic needs of the street . '
Attached is a summary of the study recommendations . A full
report -and plan exhibit is available at City Hall, 6500 Dublin
Boulevard. —
Sincerely,
Richar •�
d .C. `.'Ambrose
tip,.K " . - _ / ✓ { r
City Manager
r _
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CITY OF DUBLIN
DUBLIN BOULEVARD TRAFFIC STUDY
Summary of Study Recommendations
1 . Silvergate Drive to Donlon Way - minor changes to street to be
incorporated with the proposed development west of Hexcel .
2 . Donlon Way to San Ramon Road -
a. West bound approach to Donlon Way be restriped for two through
lanes, moving bike lane behind sidewalk.
b. East bound approach to San Ramon Road restriped for two through
lanes, two left turn lanes and one right turn lane. This will
require the raised median to be moved to the north.
C . Staff is recommending against additional access to the Shell Station
at the southwest corner of Dublin Boulevard and San Ramon Road.
However, if it is Council ' s desire to grant this requested addi-
tional access, the only practical method -to provide the access is
to install a driveway on San Ramon Road, eliminate the free right
turn at the corner, and require the station owner to obtain
approval from CalTrans, purchase access rights and pay for allthe
costs, to modify the intersection for this change. Further, the
station owner .should be required to sign an agreement and post
securities,-to replace the intersection to it' s former configuration
should the modification become a safety problem.
3 . San Ramon Road to Village Parkway- restripe :for 6 lanes, (widening at
Crown Chevrolet) , add right turn lanes and bus -,turnouts.
4 . San Ramon Road to Regional Street -
West bound.-,approach to San Ramon Road widen for a separate .right - ; :
,' ,_f ,!'turn lane �� ';" ;: -�, t .� � �F4-, ,, {. ,; -•.: :_-..-__; •- • ;
` ;.b r ;East` bound approach to Regional Streetsf widen `for a separate .right ,
'turn '•lane t asu`n r' _ rT. ,, y t s_ _ v ...a"�!'L4,'„ ".4 - 1 a:
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a , t`5 Regional Street fto .`Amador Plaza -Road -kwiden for aseparate right .turn
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.turn,lane, ;three-;through lanes ."arid one'�right ;turn lane. The free
r� 'right ':,turn -traffic island 'should":be 'eliminated.
b. ,r'A 'signal is recommended at ...Clark 'Avenue 'vith 'the ;addition. of left
turn 'lanes north `and south bound'on ..Clark 'Avenue. .` The 'deft turn
-bays on Dublin 'Boulevard should be protected with median curbs to
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be constructed with the signal installation.
9 . Clark Avenue to Dougherty Road -
a. Provide protected left turn bay at the west bound approach to Clark
Avenue .
b . Limit access to and from the most easterly Dublin Sports Grounds
driveway to right turn in and right turn out.
C . Signalize the Dublin Boulevard/Dublin Court intersection and provide
a raised median protected left turn bay east bound.
d. Close the double left turn opening midblock between Dublin Court and
Dougherty Road.
10 . Add the following lanes to the Dougherty intersection:
a. Provide an additional right turn lane east bound at Dougherty Road
and extend the left turn storage lane.
b. Widen the west bound approach from Scarlett Court to Dougherty
Road to provide a second left turn lane south bound toward I-580 .
C . North bound approach be restriped to contain dual left turn lanes,
a through lane, and a through and right turn combination lane.
d. The south bound approach to Dublin Boulevard on Dougherty Road
be restriped to contain a left turn lane, a right turn lane and
three through lanes .
11 . Dublin Boulevard to extended east northeast from Dougherty Road to the
Southern Pacific Railroad -right-of-way and then eastward. . . These _
improvements to be .done with and provide'. access . to future development-_—
east of :the existing City limit.
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aSSOC/Bibs Traffic • Transportation • Engineering
Principals:
E IV F .n, Charles E.De Leuw.Jr.,P.E.
William H.Dietrich.P.E.
`, ,, .D Larry R. Grove.P.E.
January 31 , 1984 r - �� Michael A.Kenneoy,P.E.
Hans W.Korve,P.E.
Richard T.Sauve.P.E.
Mr. W i I I Urban Daniel T.Smith,Jr.,P.E.
Shell Oil Company
P.O. Box 7004
Lafayette, CA 94549
Dear Mr. Urban: P83170-0
Pursuant to your request, DKS Associates has analyzed available options for improved
access to the Shell Station located at the intersection of San Ramon Road and Dublin
Boulevard in Dublin. This letter summarizes our findings.
BACKGROUND
The station is located in the southwest quadrant of the intersection of San Ramon Road
and Dublin Boulevard. Existing access is limited to two curb cuts along Dublin
Boulevard. Right turn access into the station from eastbound Dublin Boulevard is
available. However, raised medians on both Dublin Boulevard and San Ramon Road along
with the absence of a curb cut along San Ramon Road make direct access into the station
from all other directions difficult. Station access for westbound, southbound and
northbound traffic can only be gained by travelling west to the intersection of. Dublin _
Boulevard and Donlon Way, making a U-turn, returning eastbound on Dublin Boulevard
and accessing the station with a right turn. The station owner wishes to improve access
to his station. Options developed by the City's traffic engineer included median breaks
on Dublin boulevard adjacent to the station or provision of a curb cut on San Ramon
Road. All median break options were rejected because of their geometric infeasibility.
DKS Associates analyzed the operation and safety of the curb cut option.
TRAFFIC OPERATION
The San Ramon Road/Dublin Bo' levard 'intersection is one of the most heavily travelled d
intersections in Dublin. Existing peak hour;traffic volume are summarized below,
._"Existing Traffic Volumes* ' z
Northbound Southbound f •Eastbound Westbound
' 9 6 ;:Y� f �n1:300
AM Peak 09
12 6I 24
PM Peak 1859 635 563 ,
* Source: TJKM Counts 1/83. -
1419 Broaowa.r, Sulte 700, Oaklan-. Californla 94612-2069 • 4151763-2061
Mr. Will Urban
Shell Oil Compon, -
January 31 , 1984
Page 2
Existing geometries include three through lanes northbound and two through lanes on all
other approaches. Separate right turn lanes are provided on all approaches. Double left
turn lanes are provided westbound. All other approaches have single separate left turn
lanes. Full eight phase traffic signal control is provided.
Significant future growth in the traffic through this intersection is anticipated. Ultimate
geometrics include addition of one through lane southbound and double left turns on all
approaches.
Generally, addition of curb cuts is discouraged at major intersections. Heavy driveway
traffic can reduce street capacity and disrupt the normal traffic stream. However, at
the Shell Station location the street is over 60 feet wide. This would permit addition of a
separate right turn lane into the station while maintaining the three through lane
geometrics proposed for full buildout conditions.
The free right turn from eastbound Dublin Boulevard to southbound San Ramon Road
would provide a relatively high speed conflict with vehicles entering or existing at the
proposed curb cut location. Therefore, the free right turn should be elimated if the curb
cut is to be installed. The separate right turn lane could be retained. No significant
reduction in intersection capacity would result from modification of the right turn lane.
Adequate space exists to install the curb cut as much as 40 feet from the intersection
curb return. This would meet the City's driveway permit requirements.
TRAFFIC SAFETY
The accident history at the San Ramon Road/Dublin Boulevard intersection was reviewed
for the period between January I, 1.982 and June 30, 198:1.- The accidents occuring during
this period are summarized below.
Accident Tvoe
f Northbound Southbound Eastbound lniestbound
'r^ •.� t L Rear End. I T 9 ipl1 :'t70 h Y�,W F, > �k •:
Right Angle r I , 0 ; ,i 0
Turning Movement,:, {: 0 - a#?1 `', y :,, 0 ,7-
i
0
0, :9
r Head on r.�i 0 ;� h 0�°ct ; !
Sideswi e _ 4 ' '{ ,i, :.'=r t 0 3 ��J z 0
p w� 0 w 0
Fixed OoJect } 0 F,
0 - n
rf 0 t+
Other
A total of twelve accidents occurred at the San Ramon Road/Uublm {Boulevard c c,
intersection during this period. ,- ;- P.
Particular attention ':was given to the northeast -and northwest quadrants of the
intersection. Gas stations occupy both of these quadrants and both have curb cuts on
both Dublin Boulevard and San Ramon Road. No accidents involving use of these
driveways were recorded during the period,studied.
Mr. Will Urban. -
' Shell Oil Company
January 31 , 1984
Page 3
CONCLUSIONS
The following conclusions are based on the analysis of traffic operations and safety at
the intersection of San Ramon Road and Dublin Boulevard.
o The proposed curb cut can be provided without seriously disrupting traffic
operations at the San Ramon Road/Dublin Boulevard intersection.
o Geometric design of the proposed curb cut can provide for safe access into
the Shell Station.
We have estimated the cost of the geometric revisions associated with the proposed curb
cut to be between $507000 and $60,000. It should be noted that this estimate is based on
limited information and is intended only as an indication of the order of magnitude of the
construction costs. The estimate should be refined 'during the design phase of the
project.
If you have any questions regarding our findings please contact me.
Sincerely,
DKS ASSOCIATES
Larry A.,Patterson
Senior i ransportation Engineer - -
cc: Homid Maxsui
1 1989.Dublin Boulevard
Dublin, CA 94568
Item 7. 1 Exhibit Missing
Copy of Proposed Plan Line Improvements
STATE OF CALIFORNIA—BUSINESS AND TRA1 .,TATION AGENCY GEORGE DEUKMEJIAN, Go"mor
DEPARTMENT OF TRANSPORTATION
BOX 73 10 °
SAN FRANCISCO 94120 M..,.
(415) 557-1840
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J
JIM DICKS
Senior Engineer,Project Development 4
.r. ��R^+ F
(415) 557-3791 '.
State of California :
Department of Transportation
�a/6rvLS Donald 1. Reldt, P.E.
District 4 Mailing Address: Project Engineer -
150 Oak Street P.O.Box 7310 Project Development
San Francisco,CA San Francisco,CA 94120 (415)5,57-0591
State o California
Department of Transportation
District 4
150 Oak Street
San Francisco, Ca 94102
,AL1F04NIA-4VS1?JF$S AND PORTATION AGENCY EDMUND G. BROWN JIL. Govrww
,,ARTMENT OF TRANSPORTATION
esxa�cx xjc�;xa�rsac�cA�,x,�cx P. O.Box 7 310
SAN FRANCISCO xK)eX 94120
CIS) SS7.1BS0
October 7 , 1982
04-Ala-580 21 .6
04215 - 910002
Mr. Richard C. Ambrose
Citv of Dublin
6500 Dublin Boulevard
Dublin , CA 94566
Dear Richard:
Please refer- to our telephone conversation of October S , 1982 ,
concerning a request for a driveway on the southwest corner of
Dublin Boulevard and San Ramon Road.
The driveway in question is at a location where the station
was previously allowed to have access under provision of a
temporary lease .
'In December 1968, however, Alameda County requested the lease
be terminated and the driveway closed. This was in connection
with proposed road construction to revise the intersection and
provide channelization ,* including free right turn lanes .
Subsequently, the lease was terminated and the driveway was
closed. Since the access rights are presently owned by the -
State , a driveway would be considered only through a request from
the City with provisions of the following: =1•'- - -:
1) Access rights will be purchased or leased ,by._the owner:<= w
2) City will revise intersection design to. eliminate'-.the ''.fzee ;4'-:
right =turn from eastbound Dublin ,Boulevard -and.,:-.submit plans t, . r _..i
for Caltrans ' review. x Air:
3) City 'and/or' owner.:wi'il.`,construct imuro'vements . and< r'evisions.�stl,`c, o'.-.711
_
r -'at ;no .cost-=to ' State _ ` -r°{.'e "'..•s i i:'` s y v FCC a. L �' i C4
F � Y ft4 .l d a7S
4) City will accept`relinquishment ,of that portionj,ofSan Ramon 4; n.x s
Road fronting the service : station ~
The above is. also subject . to the _auproval of the Cal iforniac• : -
Transportation Commission and7the Federal Highway Administration: W:_ '_ -
If you have any additional questions regarding this matter, please
let me know. - - .
�.) Si ' c e ly yours ,
l
C. K. EE
Senior Engineer . :
Project Development