4. Traffic Study PolicyCITYOF
CHANHASSEN
7700 Market Boulevard
PO Box 147
Ohaohassen PaN 55317
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The City of Chanhassen. A growing
MEMORANDUM
TO: Kate Aanenson, Planning Director
FROM: Matt Saam, Assistant City Engineer/~'L~D
DATE: June 29, 2004
SUB J: Private Development Traffic Study Policy
PW236C
Since this item was last discussed by the Planning Commission (PC) in fall, 2003,
staff has further refined the proposed traffic study policy. The previous proposal
contained the following rules/requirements:
Hire a traffic engineering consultant to perform a traffic study. The
developlnent applicant will be required to escrow with the City 110% of the
cost for the traffic study.
2. Traffic studies will be required to obtain a minimum of 48 hours of existing
traffic data roi- the area/intersections in question.
o
In addition to normal staff review of the traffic study, staff will also review
City records for existing traffic count data on the area in question. This
comparison with City data will help ensure that the existing traffic data is
accurate.
Based on comments received from the PC and traffic engineering consultants, staff is
proposing the following revised rules:
1. Same as above.
Traffic studies will be required to obtain a minimum of one weekday's AM
(6:00 AM - 9:00 AM) and PM (3:00 PM - 6:00 PM) existing traffic count
data tbr the area/intersections in question. This data cannot be obtained on
weekday holidays. For developments where school-related traffic is expected
to be affected, the applicant must obtain existing traffic data during a calendar
school year (September-May).
3. Same as above.
The main revision to Item No. 2 above deals with the time of day the traffic is
collected. After discussing this with a traffic engineering consultant and reviewing
other studies, it appears that the most significant times of day roi' traffic data
collection are the morning and afternoon rush times. It is these times that are looked
at for level of service reviews and for intersection improvements (i.e. turn lanes). Of
course, certain developments may require additional counts of 48 hours. These
situations will be looked at on a case-by-case basis.
c: Paul Oehme, City Engineer/Dir. of Public Works
g:\cng\traffic cotuns\priYate dc,,', traffic study policy 6-29 04.doc