Where a traffic impact study is required or requested by the
or
, including when a component in an overall Impact Study, the applicant
bear the cost for preparation and evaluation of a study prepared by a traffic engineer with experience preparing traffic impact studies in Michigan during the preceding three (3) years to address the following:
a. Existing conditions including existing daily and peak hour traffic on adjacent
(s), a description of any sight distance limitations along the site’s
frontage and accident histories within five hundred (500) feet of the site and for any intersection which will experience a traffic volume increase of at least five percent (5%) during the day or during a peak hour due to the proposed project.
Where existing traffic counts are more than two (2) years old, new counts should be taken. Traffic counts
be taken on a Tuesday, Wednesday or Thursday of non-holiday weeks. Additional counts (i.e. on a Saturday for a proposed commercial
)
also be required in some cases. The following times/situations should also be avoided where possible so that the traffic count data would represent a typical day: construction detours in the area, summer days for a site near a school, etc. The firm performing the impact study must make every effort to complete traffic counts during average or higher than average volume conditions (i.e. regarding weather or
variations) for the area under study.
b. Forecasted trip generation of the proposed
for the a.m. and p.m. peak hour and average daily traffic generated. The forecasts
be based on the data and procedures outlined in the most recent edition of the Institute of Traffic Engineers Trip Generation Manual. The applicant
other commonly accepted sources of data or supplement the standard data with data from similar projects in Michigan.
c. For requests for a zoning change when such request represents a departure from the
proposed in the City
, the study should contrast the traffic impacts of typical uses permitted in the requested zoning
with uses permitted in the current zoning district. The
determine typical uses to be considered.
d. Projected traffic generated
be distributed (inbound v. outbound, left turn v. right turn) onto the existing
network to project turning movements at major site access points and nearby intersections or expressway interchange ramps. Rationale for the distribution shall be provided. If any streets are proposed for realignment or vacation, the study shall forecast the changes in traffic conditions along affected streets.
e. Capacity analysis at the proposed access points along public streets using the procedures outlined in the most recent edition of the Highway Capacity Manual published by the Transportation Research Board. Pre- and post-construction capacity analyses
also be performed at all
intersections or expressway ramps where the expected traffic will comprise at least five percent (5%) of the existing intersection capacity and/or for roadway sections and intersections experiencing congestion or a relatively high accident rate, as determined by the City.
(Amended 2-14-1996)
f. The City
require a “gap study” to analyze the frequency and duration of gaps in the flow of through traffic to accommodate turning movements.
g. Analysis of any mitigation measures warranted by the anticipated traffic impacts. Where appropriate, documentation
be provided from the appropriate road agency regarding time schedule for improvements and method of funding.
h. A map and description of the location and design of proposed access (driveway or new
intersection), including any sight distance limitations, dimensions from adjacent driveways and intersections within two hundred fifty (250) feet, other data to demonstrate that the design and
of driveways proposed is the fewest necessary, and the driveway(s) will provide safe and efficient traffic operation and be in accordance with the standards of this ordinance.
i. An analysis of the potential need for bypass lanes or deceleration tapers/lanes, including attachment of any correspondence by the Genesee County Road Commission or the Michigan Department of Transportation, as appropriate.
j. Resume and qualification of the preparer.