traffic study upper mill/crawford 12/13/1976December 13, 1976
TO: Keith Rawlings, City Planner
FROM: D. W. Bassett, Traffic Engineer
SUBJECT: Stonehinge Development
This is in reply to your request for a traffic study in the area of
Crawford Avenue and Upper Mill Heights Drive.
Our department has reviewed the site plan and find that approximately
one hundred (100) vehicles can be stored in this area. We also noticed
that only nineteen (19) spaces are provided for'.vehicles that would be
entering directly onto Crawford Avenue. However, we will assume that
all vehicles stored in this area will use Crawford Avenue either from
the parking lot driveway or at Upper Mill Heights Drive.
According to the "Transportation and Traffic Engineering Handbook",
by the Institute of Traffic Engineers, the average trips generated by:
a multi -family area such as this would be two and five tenths (2.5)
trips per day per unit. This would generate two hundred fifty (250)
vehicles either in or out, of this area per day.
Crawford Avenue, through this area, has a capacity of six hundred
fifty (650) vehicles per hour and the present traffic volume is.approx-
imately six thousand two hundred (6,200) vehicles per day with a peak
hour volume of three hundred forty (340) vehicles. The traffic volume
on Upper Mill Heights Drive is approximately one hundred fifteen (115)
vehicles per day.
At a 'T' intersection, such as Crawford Avenue and Upper Mill'Heights
Drive, that has a traffic volume of six hundred fifty (650) vehicles per.
hour on Crawford Avenue; and by using an average left turn movement along
with ten (10%) per cent truck traffic there could be two hundred ninety.
(290) vehicles per hour entering Crawford Avenue from Upper Mill Heights
Drive. This would stili maintain a service level of 'C' which is still
in the zone of stable traffic flow..
In review of these facts, it is obvious that the traffic volume on
Crawford Avenue is not near.capacity flow.
This department forsees no special problem in this area, due to the
traffic volume, that might be generated by this development.
. Bassett
DWB:MKP