HomeMy WebLinkAboutItem 7.4 TrffcStdySgnlsVP 1/84 CITY OF DUBLIN
AGENDA STATEMENT
CITY COUNCIL MEETING DATE: January 23, 1984
SUBJECT
: Traffic Study - Signals on Village Parkway
EXHIBITS ATTACHED : Memo from City Traffic Engineer dated January 13, 1984
RECOMMENDATION Direct Staff to incl~ signal installations at
Village Parkway withfB__righton Drive and with Tgmarac_~k
Drive for future consideration in' ~he Five-Year
a~tal Improvement budget to be updated in June, 1984
FINANCIAL STATEMENT: These signals, when constructed, will cost in the
range of $100,000 to $120,000 each
DESCRIPTION : The Council directed Staff to study these two
intersections at the request of a citizen of Dublin for the possibility of
replacing the four-way stop intersection control with traffic signals.
TJKM has completed that study and their memo report is attached.
These intersections do meet signal warrants with the Brighton Drive
intersection indicating a higher priority. It is felt that even though
these intersections do meet the warrants, other locations in the City do
have a greater need.
ITEM NO. ~' ~
COPIES TO: Steve Burns,
7300 Emerald Avenue
MEMORANDUM
DATE:
TO:
FROM:
SU BJ ECT:
January 13, 1984
City Engineer
Chris D. Kinzel
Investigations of Signalization Needs -
Intersection of Village Parkway at Brighton Drive
and Tamarack Drive
As requested by the City Council, investigations of the needs of
signalization at the intersections of Village Parkway/Tamarack Drive and
Village Parkway/Brighton Drive were conducted. Field evaluations and
traffic volume investigations were performed along with a review of past
accident trends. This memorandum summarizes our findings and
recommendat ions.
Intersection of Village Parkway and Brighton Drive
Currently, the intersection is controlled by a four-way STOP
installation. The average daily traffic volumes are approximately
15,500 vehicles per day (vpd) on Village Parkway near Brighton Drive,
4,000 vpd on Brighton Drive east of Village Parkway, and 2,30(] vpd on
Brighton Drive west of Village Parkway. Pedestrian flows at this
intersection are heavy because it is adjacent to the Dublin High School.
Traffic signalization is warranted at this intersection based on
existing traffic volumes.
Although existing operating conditions are relatively satisfactory at
this intersection under four-way STOP sign control, there is occasional
confusion as to which vehicle should have the right-of-way next. The
chances for cbnfusion at the intersection increase as the traffic
volumes increase. Because of the left turn vehicles, the right-turn
vehicles, multiple lanes of through vehicles and pedestrians, all
vehicles have to stop at the intersection and move in an individually
perceived priority.
Accident records show that five accidents occurred at this intersection
between January 1, 1982, and June 30, 1983; and four of them are types
susceptible to correction by a traffic signal installation.
City Engineer -2- January 13, 1984
Intersection of Village Parkway and Tamarack Drive
Currently, this intersection is also controlled by a four-way STOP sign
installation. The traffic volumes on Village Parkway near Tamarack are
close to those near Brighton Drive. The average daily traffic volumes
on Tamarack Drive are approximately 1,000 vpd east of Village Parkway
and 2,300 vpd west of Village Parkway. Tamarack Drive serves the
Frederiksen Elementary School, but there is only one crosswalk at the
intersection of Village Parkway/Tamarack Drive. Therefore, the
pedestrian flow have a lesser effect on the intersection's operating
conditions as compared with the Brighton Drive intersection.
Traffic signal warrants are only marginally met at this intersection.
Since the traffic volumes on Tamarack Drive are relatively low, the
traffic operating conditions at this intersection are better than those
at the Brighton Drive intersection.
Between january 1, 1982, and June 30, 1983, only one reported accident
occurred at this intersection.
Recommendati OhS
Generally speaking, existing traffic conditions now warrant traffic
signals at both locations. However, these two intersections are already
under four-way STOP sign control which means that on a priority basis
these locations are less urgent to signalize than other intersections in
the City. The most useful aspect of signals would be to return Village
Parkway to its importance as a through arterial. Signals installed at
both locations would normally display green lights for Village Parkway
and respond to approaching side street vehicles.
Since it is anticipated that the installation of signals at these two
intersections would decrease the average vehicle delay and would
decrease the number of vehicle stops made at the intersections, it is my
recon~nendation that signals be planned for both locations and that they
be included in the next update of the Capital Improvement Program for
specific scheduling. Also, the signalization of the intersection of
Village Parkway/Brighton Drive should have a higher priority than the
Tamarack Drive intersection.
as/jr