TR9902-CS 99072107~21/99
WED
FAX
DATE;
TO:
FROM:
11:36 FAX 97223 ~i.~20[
DALLAS
Kimley-H0rn
and Associates, Inc.
MEMORANDUM
July 21, 1999
Mr. Ken Griffin, City of Coppell, FAX 972-304-3570
Wayne Kurfees, Kimley-Hom and Associates, Inc.,
12700 Park Central Drive, Suite 1800, Dallas, Texas 75251
FAX 972/239-3820, DIRECT VOICE 972/770-1320
SUBJECT; Dr~dt Scope for CORSIM*~" Analysis of Driveway on Mac. Arthur South of Belt Line
NO. OF PAGES (INCLUDING THIS PAGE): 3
Thanks again for taking the time yesterday to provide your thoughts regarding the possibility of
signalizing the shopping center driveway on Mac, Arthur south of Belt Line Road. We fully concur that
the City should approve such a signal only if it is warranted and can be operated in a manner that will
not have an unduly adverse affect on the through traffic on Mac, Arthur.
Attached for your review and comment is the draft of a scope for a CORSIMTM traffic simulation analysis
that would show, both quantitatively and visually, whether or not a signal at this driveway could be
properly coordinated with the existing signal at Belt Line & MacArthur. Please review this scope and
mark any changes that you think are necessary for the study to answer the questions that you feel need
to be answered. In particular, please look over the section called "Data To Be Furnished by the City."
If any of the count data is not available (or is not recent enough, in your opinion), we will include the
collection of the new data in the proposal we send to our prospective client.
Thanks again for your help. We look forward to receipt of your comments.
This facsimile ia intended only for the addressee named herein and may contain Information that is confidential. If you are
not the intended recipient or the employee or agent responsible for delivery to the addressee, you are hereby notified that
any review, diesemination, disclosure, or copying of this communica~on is etricl~y prohibited, ff you have received this
facsimile in error, pleaee immediately notify us by telephone, and return the original facsimile to ue at the eddrees above via
the U.$, Po~tal Service. Thank you.
G:\TPTO\3FUTURE'~IISC\GRIFFIN 1 .FAX
07/21/99 WED 11:36 FAX 9722393820
T
DALLAS
OO2
Project Understanding:
The City of Coppell (hereinafter "the City") has been requested to install a traffic signal on
Mac.Arthur Boulevard at a commercial driveway located approximately 600 feet south of Belt
Line Road. This driveway serves a shopping center which includes a Tom Thumb supermarket.
The Texas Manual on Uniform Traffic Control Devices (TMUTCD) sets forth several "warrants",
or justifying sets of conditions, at least one of which should be fully satisfied before consideration
is given to signalizing an intersection. Although previous studies have indicted that one or more
of the TMUTCD signal wan-ants is probably met, such satisfaction does not imply that a signal is
either necessary or should be installed. Accordingly, the City believes that a more in-depth
operational analysis should be performed to show whether or not a signal at the driveway can be
coordinated with the existing signal at Belt Line Road in a manner that will ensure minimal
disruption to through traffic on MacArthur.
Scope of Services:
Task 1 -- !'CORSIM" Traffic Simulation Analysi.~, Using the CORSIMTM model, Kirnley-
Horn and Associates, Inc. (hereinafter "KHA") will develop a computer simulation of traffic
'operations within the following limits:
MacAnhur Boulevard flora approximately 500 south of the subject driveway to
approximately 500 feet north of Belt Line Road; and
Belt Line Road from approximately 500 feet west of MacArthur Road to
approximately 500 feet east of Fairway Drive.
For the AM and PM peak hours (i.e., the peak 60-minutes occurring between 6:30 AM and 8:30
AM and between 4:30 PM and 6:30 PM), KHA will specifically model the following three
scenarios:
Scenario A -- The exi~ing operation (i.e., using the existing cycle lengths, splits, and
other coordination param~ers) of the existing signals on Belt Line at MacArthur and at Fairway
together with the subject driveway remaining unsignalized.
Scenario B -- The existing operation of the existing signals on Belt Line at MacArrhur
and at Fairway together with optimized signal operation at the subject drive-way
Scenario C -- Same as Scenario B except with newly optim/zed operation of the existing
signals on Belt Line at MacArthur and at Fairway.
Task 2 -- Renorts. KHA will develop a brief technical memorandum which describes the
results of the computer simulations. For each of the three scenarios, we will document the
various measures of effectiveness as reported by CORSIM. These will include overall system
delay (in vehicle-hours per hour), and for each movement at each of the three intersections, both
G:\TPTOk3FUTURE~VESCKSCOPEI.WPD - 1 -
07/21/99 WED 11:36 FAX 9722393820
DALLAS
003
the avcrase delay (in seconds per vehicle) and the queue lengths (50th and 95th percentile).
Although this data will be presented in tabular format, we will also include an executive summary
in narrative format.
KHA will submit a preliminary copy of this draft report to the Client. Subsequently, KHA will
confer telephonically with the Client to receive input. We will then submit a revised draft of the
report for the City's review. ARer a review meeting (see Task 3 below), we will incorporate
mutually asreed-upon revisions and submit a final report.
Task 3 -- M~etin_ns and Presentations, KHA will meet once with the City to present and
discuss the CORSIM computer simulation and to receive the City's comments on the drat~ report.
It is anticipated that this meeting will occur at the City's offices and that representatives of the
Client may attend.
Task 4 -- Additional Services, As requested and authorized by the Client, KI-IA will provide
other related services. Such services may include (but are not limited to) additional analyses or
simulations (beyond those described in Task I above), additional repons (beyond those described
in Task 2 above), and/or additional meetings or presentations (beyond those described in Task 3
above). Also, the design and preparation of construction plans for a signal (if subsequently
approved by the City) is beyond the scope of this a~reement.
Data To Be Furnished by the City. It is assumed that the following data will be furnished to
KHA by the City at no cost to KHA:j
~,3- I~.~l) Recent AM and PM peak ho~r turning movement counts of the following intersections:
4~',5 ~t~- Belt Line & MacArthur, Belt Line & Fairway, and MacAnhur at the subject driveway.
~ 00~1\ ~ 2) Existing signal timing data (including coordination parameters) for the intersections of
'"' ~e~v~bx Belt Line & MacArthur and Belt Line & Fairway.
~)¢ ~,33 ,,~3) A copy of any previous studies (inclUding signal warrant analyses) of MacArthur's
_0n~ 5 intersection with the subject driveway.
O:kTPTO~3FUT~C~SCOPE I .WPD
-2-