HomeMy WebLinkAboutItem 6.1 Stop Sign Request Lancaster Rd (2) CITY OF UBLIN
AGENDA STATEMENT
City Council Meeting Date: February 24, 1992
SUBJECT: Public Hearing: Request for Stop Sign and Crosswalk
Installation on Lancaster Road at Ann Arbor Way
Report by Public Works Director Lee Thompson
EXHIBITS ATTACHED: 1) Letter from Mrs. Rose Deming and Petition
2) Report from TJKM
3) Location Map
RECOMMENDATION: 1) Open public hearing
\ 2) Receive Staff presentation and public comment
3) Question Staff and the public
4) Close public hearing and deliberate
5) Deny request on the basis that stop signs and a
crosswalk in this location are unwarranted and
would create a false sense of security for
pedestrians
FINANCIAL STATEMENT: No cost to the City if request is denied. The cost of
a stop sign installation, including Stop Ahead signing
and marking, and a crosswalk would be approximately
$1,000.
DESCRIPTION: In November of 1991, Staff received a letter and
petition from Mrs. Rose Deming requesting that the City consider installing stop
signs and a crosswalk on Lancaster Road at the intersection of Ann Arbor Way. There
is an existing stop sign on the north (Ann Arbor) leg of the intersection. The
reasons indicated in Mrs. Deming's letter are (1) reduction of speed and (2) to
provide a safe crossing for children going to school. The Traffic Safety Committee
subsequently studied the intersection, and Mrs. Deming was advised that Staff
recommended against the stop sign installation. Mrs. Deming has requested that the
City Council review her request and Staff's findings, which are as follows.
Lancaster Road is a neighborhood street which parallels Amador Valley Boulevard and
forms a straight line between York Drive and Penn Drive. York and Penn are
collector streets which form a loop around the Wells/Cronin School sites and enter
Amador Valley Boulevard. Ann Arbor Way forms a "T" intersection with Amador Valley
Boulevard at its north end and with Lancaster Road at its south end.
There are presently school (yellow) crosswalks across Lancaster Road at both Penn
Drive and York Drive, and there are single-approach stop signs for traffic entering
York and Penn from Lancaster Road. There are crosswalks across Amador Valley
Boulevard at both Penn Drive and York Drive, and also at Burton Street. The Burton
Street intersection is controlled by three-way stop signs and has an adult crossing
guard during the hours that children are going to or coming home from school. It
was intended that children going to school utilize the existing crosswalks. Mrs.
Deming's letter states that the crosswalks at York and Penn Drives are not
convenient for some children and that they tend to cross the street at any location
along Lancaster.
Staff requested that TJKM, the City's traffic engineering consultant, prepare a
report concerning this request. TJKM's report is summarized as follows:
Volume Warrants
The highest 8-hour vehicular volume entering the intersection was a total of 264
vehicles. As indicated on the attached warrants, the minimum volume warrant is 300
vehicles per hour for the highest 8 hour period. Therefore, the vehicular volume
(average 33 per hour) at this intersection falls far short of this warrant. TJKM's
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ITEM NO. COPIES TO: Rose Deming, 6928 Lancaster Rd.
Carl Springer, TJKM C T Y CLERK
FcC11 , 9 D
volume warrant, which the City has used for stop sign studies in the past, is lower
than the State warrant of 500 vehicles per hour.
Pedestrian counts were conducted during the times of day that children would be
walking to school. During the morning count, 8 pedestrians and 3 bicyclists crossed
Lancaster Drive southbound at Ann Arbor. There were no pedestrians or bicyclists
crossing in other directions. During the afternoon count, no pedestrians or
bicyclists crossed in any direction. It should be noted that the afternoon count
was based on the time of day that children would be leaving Frederiksen School
rather than Wells School, as TJKM focused on the safety of younger children. TJKM' s
report states that the school departures are spread over a wider range of time than
the morning arrivals, which would tend to reduce the number of pedestrians per hour.
Accident Warrants
There have been no reported accidents at this intersection since Staff began
maintaining its accident map in 1984. The accident warrant is five or more
accidents per year of a type correctable by stop signs. Therefore, the accident
warrant is not met.
Visibility
Lancaster Road is a level street with clear visibility in both directions for well
over the warrant of 160 feet.
S eed
A speed survey reveals an 85th percentile speed of 22 mph westbound and 26 mph
eastbound. Overall, 90% of the vehicles recorded were traveling under 25 mph. Only
one of the 341 vehicles recorded was traveling over 30 (and less than 35) mph.
Conclusion
Based on the criteria listed above, Staff feels that the intersection of Lancaster
Road and Ann Arbor Way does not meet the warrants for multi-way stop sign
installations. The intention behind installation of stop signs is to assign right-
of-way at intersections and to reduce the number of accidents. Stop signs are not
an effective means of speed control. While the speed of vehicles may be reduced at
the intersection itself, motorists tend to speed up between stop signs; therefore,
speeding would not be alleviated.
When stop signs are installed in locations where there is little cross traffic,
drivers tend to come to rolling stops or to ignore the stop signs completely. A
pedestrian or bicyclist, particularly a child, may feel falsely secure crossing the
street at a stop intersection when, in fact, an oncoming vehicle may not come to a
stop. Additionally, drivers who develop the habit of ignoring unwarranted stop
signs may also ignore stop signs that are warranted. Most drivers are law-abiding
and have no intention of violating traffic regulations; however, when an unwarranted
restriction is imposed, it may result in unintentional violations.
Stop signs also add to the pollution problem by increasing the amount of gasoline
used by cars in starting and stopping rapidly.
Regarding the matter of the crosswalk, pedestrians also tend to feel safe in a
crosswalk and may step out into the street in front of oncoming traffic.
Conversely, pedestrians tend to look for cars more carefully when the "protection"
of the crosswalk is not there. In this case, crosswalks exist within a block or two
of the Lancaster/Ann Arbor intersection, and Staff recommends that children walking
to either Frederiksen or Wells School utilize the existing crosswalks.
Staff recommends that the City Council conduct a public hearing, deliberate, and
deny the request for stop signs and a crosswalk on Lancaster Road at Ann Arbor Way.
a: (corres)\feb\agststop
Page 2
October 26 , 1991 �►
C�
Mr . Lee Thompson
DUBLIN POLICE SERVICES v0s,`Q, Ap'o
100 Civic Plaza
P.O. Box 2340 /Ce�O
Dublin, CA 94568
Dear Mr . Thompson,
There is a need to install a Stop sign and perhaps a cross-
walk at the intersection of Ann Arbor Way and Lancaster Road .
Attached are resident signatures who are in favor of this
action. The reasons below justify our request .
REDUCE HIGH SPEEDS Lancaster Road is a long stretch of road
with 24 houses end-to-end. Cars frequently exceed the speed
limit resulting in an unsafe residential environment . There
are many children and animals playing along this road . People
who exceed the speed limit could easily cause an accident or
even death.
PROVIDE SAFE CROSSING Lancaster Road is intersected by one
road . This road is called Ann Arbor Way . There are stop signs
and cross-walks at both ends of Lancaster . These end streets
are York Drive and Penn Drive . Ann Arbor intersects Lancaster
half-way down Lancaster Road or 12 houses from York Drive .
Wells School is located behind Lancaster Road : If any children
going to or from school should need to cross the street safely,
they must walk to. either end of Lancaster to do so . Because
there is no convient crossing at this time , children cross the
street anytime and anyplace. There is danger in doing so since
high speeds are often reached along Lancaster Road .
There are 3 courts along the same side as Ann Arbor . Ann Arbor
is the only through street and is located at midpoint of
Lancaster Road .
Please consider this complaint as necessary action to prevent
a tragedy from happening in the future .
cerely,
Rose Deming
6928 Lancaster Road
Dublin, CA 94568 (829-8819)
And
All of the resident signatures attached .
LETrW- "t>
Attachment to Letter
I agree to the fact that Lancaster Road is in need of a
stop sign at the intersection of Ann Arbor Way. This stop
sign will-provide a safe place to cross and reduce the speed
of automobiles .
DATE SIGNATURE ADDRESS PHONE
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MEMORANDUM f F� #I te Z
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January 30, 1992 R
TO: Mehran Sepehri
FROM: Christopher S. Kinzel
SUBJECT: Lancaster Drive/Ann Arbor STOP Sign Request
This is to present the results of our analysis related to the request for STOP signs at
the intersection of Lancaster Drive and Ann Arbor Way in the City of Dublin. TJKM
conducted 24-hour machine volume counts and speed measurements at the
intersection on Tuesday, December 3, 1991. In addition, manual pedestrian crossing
counts were conducted at the intersection on the same day.
The T-intersection currently operates with stop control on the Ann Arbor leg. The
need for additional STOP sign control on Lancaster Drive was evaluated based on the
stop sign warrants presented in Attachment A. The following discussion looks at each
of the warrants in turn.
WARRANT 1: Volumes
The 24-hour machine counts revealed that the highest 8-hour vehicular volume
entering the intersection was 264 vehicles, an average of 33 vehicles per hour. This
volume is 11 percent of the volume required to satisfy the first warrant. Therefore,
the first warrant is not met.
The pedestrian counts were conducted from 7:30 to 9 a.m. and from 1:30 to 2:30 p.m.
to reflect the expected peak pedestrian crossing hours based on both Wells. and
Fredriksen school schedules. During the a.m. count period, 8 pedestrians and
3 bicyclists crossed Lancaster Drive southbound on the west leg of the intersection.
No pedestrians crossed either of the other two legs of the intersection during the a.m.
count. In addition, no pedestrians crossed any leg of the intersection during the p.m.
count period. The p.m. peak measurement period reflects the Fredriksen schedule
more than the Wells schedule due to a focus on the safety of younger children. It is
important to note, however, that school departures in the afternoon are spread over
a wider period of time than are morning arrivals, lessening p.m. hourly pedestrian
volumes overall.
4837 Chabot Drive,Suite 214, Pleasanton,California 94588-:
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WARRANT 2:Accidents
City staff reports that no accidents are Down to have occurred at the intersection
within the past eight years. Therefore, the accident warrant is also not met.
WARRANT 3: Visibility
The actual sight distance on both Lancaster Drive approaches to the intersection was
not measured, but visibility in both directions very obviously exceeds 160 feet.
Therefore, this warrant is not met.
SPEED STUDY
The machine speed survey revealed that the 85th percentile speed on Lancaster Drive
is 22 miles per hour(mph) westbound and 26 mph eastbound. Overall, 94 percent of
the vehicles recorded were travelling under 25 mph and 6 percent were travelling
between 26 mph and 30 mph. (Only one vehicle of the 341 vehicles recorded during
the 24-hour period was travelling between 31 and 35 mph). The results of the speed
study indicate that there is good compliance with the 25 mph speed limit through the
intersection.
CONCLUSIONS
The Federal Highway Administration's Manual of Uniform Traffic Control Devices
warns that STOP signs should not be used as speed control devices. Placing a STOP
sign at the intersection could possibly create more problems than it would solve. The
infrequent speeding through the intersection would become even less frequent, but
speeding on other segments of Lancaster Drive could be worsened. Also,a STOP sign
(and/or crosswalk) could give pedestrians a false sense of confidence in crossing the
intersection. For these reasons and those mentioned above,all-way STOP sign control
is not warranted at the intersection of Lancaster Drive and Ann Arbor Way from a
traffic engineering standpoint.
COPY: Lee Thompson
Carl Springer
ATTACHMENT I
WARRANTS FOR THREE-WAY STOP SIGN INSTALLATION
Three-way_.STOP sign installation may be considered if any of the following
conditions exist:
WARRANT 1: VOLUME
Total vehicular volume entering the intersection from all approaches must average
300 per hour for any eight hours of an average day. (24-hour equivalent
approximately 4,000 vehicles.)
In addition, the vehicular volume entering the intersection from the minor street or
streets for the same eight hours must average at least 1/3 of the total volume
entering the intersection(100 per hour minimum).
WARRANT 2: ACCIDENTS
Five or more of types susceptible of correction by STOP signs within a 12-month
period, with satisfactory observance and enforcement of less restrictive control.
WARRANT 3: VISIBILITY
The straight line sight distance on one of more approaches of the major street for
vehicles or pedestrians crossing the intersection is less than 160 feet.
NOTE:
Volume-warrants to be reduced by a 60 percent Residential Area factor
if ALL of the following conditions are met:
(a) Both streets have residential frontage with existing 25 miles per hour
speed limits.
(b) Neither street is an adopted through street.
(c) Neither street exceeds 40 feet of roadway width.
(d) No existing STOP sign or signal is located on the more heavily
traveled street within a distance of 800 feet.
(e) Intersection has three legs, with streets extending 800 feet or more
away from the intersection on at least two sides.
(f) Installation of a three-way STOP is compatible with overall traffic
circulation needs for the residential area.
11/02/90
157-001
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