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Transportation Impact Analysis (TIA) Guidelines

TIAs are prepared to assess the transportation impacts of land development projects and to assist in identifying whether improvements are needed to the roadways, bike routes, sidewalks, and transit services affected by the project. As the Congestion Management Agency (CMA) for Santa Clara County, VTA establishes the TIA Guidelines that local agencies use when analyzing the transportation impacts of land development projects on the transportation system. The Guidelines are also often used by local agencies as a reference for the Transportation Analysis in environmental documents.

A new version of the VTA TIA Guidelines was adopted by the VTA Board of Directors in October 2014, the culmination of a two-year update process with extensive stakeholder involvement. The new Guidelines include updated procedures for documenting auto trip reductions, analyzing non-auto modes, and evaluating mitigation measures and improvements to address project impacts and effects on the transportation system.

The following are links to the October 2014 VTA TIA Guidelines:

There are two TIA-related forms that are included in the TIA Guidelines document: a TIA Notification Form (refer to Section 3.1 and Appendix B) and the Auto Trip Reduction Statement (refer to Section 8.2 and Appendix C).  VTA has developed “fillable” versions of these forms that can be filled out electronically and emailed or printed:

For a more accessible version of these documents or if your assistive technology requires a different format, please contact Robert Swierk, Senior Transportation Planner, at (408)321-5949 and we will try to accommodate you.

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