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Traffic Study Information

  • A Transportation Impact Study (TIS) is conducted to evaluate the impacts of proposed developments on an existing transportation roadway system and to assist both public and private planners in making decisions with regard to the allowance or disallowance of these proposed developments.  These studies evaluate the changes in traffic attributable to the proposed development and translate them into transportation impacts in the vicinity of the proposed development.  Most studies define the on-site and off-site transportation system improvements needed to accommodate the additional traffic generated by the development. These recommended transportation improvements are termed mitigation measures.

  • A TIS can be assembled in different formats. Click here for a sample report outline of a TIS. This outline is general and can be expanded or contracted depending upon specific issues and local requirements.

  • A TIS should be conducted when a proposed development exceeds 100 vehicle trip ends during the highest weekday peak hour.  Click here to see the size of some typical generators that achieves 100 vehicle trip ends.

  • Once transportation impacts are identified in the study, a number of potential mitigation measure options exist to alleviate these impacts.  Click here for information on some potential transportation related mitigation measures.

  • The following TIS reference documents are recommended from the ITE Bookstore for use in the preparation and review of a TIS.

    1. Transportation Impact Analyses for Site Development: An ITE Proposed Recommended Practice

    2. Trip Generation, 11th Edition: An ITE Informational Report

    Click here for TSITE’s Did You Know TIS Brochure.

Presentations / Handouts

Past Meeting Presentations:

TSITE Logo (All Rights Reserved)

Sizes: 525 x 159 PNG | 250 x 76 PNG
Color Match: #009C45 & #29166F

TSITE Logo White.png

TSITE Brochures

Special thanks to Zach Johnson (TDOT), Bryan Bartnik (TDOT), & Karen Trowell (Arcadis) of the 2018 SDITE Leadership Class for creating the brochures below:

Parking Trend in Tennessee Brochure

Pavement Marking Brochure

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