HomeMy WebLinkAboutNORTH LEMAY PLAZA PUD - PRELIMINARY - 57-87 - REPORTS - TRAFFIC STUDY (2)REVISED
PRELIMINARY
TRAFFIC IMPACT STUDY
FOR
LEMAY PLAZA P.U.D.
REVISED OCTOBER 7, 1987
PREPARED BY PARSONS & ASSOCIATES CONSULTING ENGINEERS
432 LINK LANE PLAZA
FORT COLLINS, COLORADO 80524
(303) 221-2400
PROJECT NO. 87.18 PDQ
PRELIMINARY TRAFFIC IMPACT STUDY
LEMAY PLAZA P.U.D.
PROJECT LOCATION
The site is 1.60 acres and is located at the Southwest corner of
Lemay Avenue and Conifer Street,-' which is a "T" intersection.
The Lemay frontage is 210 feet and the Conifer frontage is 302
feet. Lake Canal runs along the South property line, and at the
Southeast corner of the property there is a 4' x 17' box culvert
under Lemay. The proposed access to the site is one curb cut on
each street.
PROJECT DESCRIPTION
Lemay Plaza P.U.D. is intended to
consisting of a PDQ ;convenience
gas pumps) and 10,000 square
space. The anticipated, use
specialty retail shops.
PRELIMINARY RESULTS
A.. ADJACENT STREET TRAFFIC
be a neighborhood retail center
store (2600 square feet with 3
feet of undetermined use retail
is service establishments on
Figures 1 through 4 show the traffic counts obtained during
the hours of 7 to 8 AM and 4 to 6 PM on Thursday, August 27,
1987, broken out in 15 minutes and peak hour.intervals. The
bulk of the AM traffic flows South on Lemay and the bulk of
the PM traffic flows North.on Lemay.
Lemay i_s currently a two-lane county road, a 30-foot section.
Conifer is a city collector with a 60' section.
B. INTERSECTION OPERATING LEVEL
Currently, the intersection is controlled by a stop sign
on Conifer. The critical movement is the left turn from
Conifer onto Lemay. During the A.M. peak of our traffic
counts, a total of nine vehicles made this movement.
During the P.M. peak, there were 27 vehicles.
The critical gap for left turns from a stop sign ranges
J%Y
from 6.2 to 7.2 (Transportation and Traffic Engineering
P
}
Handbook). Using the A.M. peak traffic, the average
total delay is approximately 10 seconds. Similarly, the
P.M. average total delay is approximately 20 seconds.
This corresponds to a load factor of 0.0 during the A.M.
peak and 0.1 during the P.M. peak. Therefore, the level
of service is currently A/B.
C. TRIP GENERATION
The trip generation rates shown in Figure 5 were obtained
from I.T.E.'s Trip Generation Report (See Figures 8 and 9).
These rates were separated into two categories: those trips
from passing traffic and those generated by the site. These
site generated trips were then distributed according to the
same percentages of existing traffic.
D. SIGNAL WARRANT '
Based on the existing traffic counts, the intersection does
not warrant a traffic signal. Adding in the site generated
trips, the intersection will still not warrant a signal at
this time.
E. POSSIBLE PROBLEM AREAS
During the AM Peak; there appears to be no problems with
movements into or out of the site. During the PM Peak,
possible .left turn conflicts exist --with the northbound Lemay
traffic.
F. LEFT TURN FROM CONIFER
Because of the light traffic on Conifer, applicable queue
formulas show a queue of approximately 1.0. The proposed
distance from the intersection to the curb cut is 135'
which is enough for about 6 cars. Therefore, the
distance should be adequate.
iG. PROPOSED LEMAY IMPROVEMENTS
Lemay will eventually be an arterial. The box culvert
crossing of Lake Canal would have to be widened.. If the City
desires improvements to Lemay at the time of` the development
of this site, we propose a 70-foot section with an 8:1
transition assuming there is no right-of-way problems. if
the City ,desires that this site not develop their portion of
Lemay at this time and contribute at a later date, we feel
the existing road sections will accommodate the flow of
traffic.
CONCLUSIONS
Based on this preliminary study, we feel the proposed development
will not h sue, a detrimental impact upon present traffic
conditions. If uture conditions warrant a traffic signal, we
feel the curb is are an adequate distance from the intersection
based on the number of vehic73c ng turning movements.
Prepared by:
Colorado License #18792
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