SB743 TIA Guidelines

Traffic Impact Analysis Guidelines for Vehicle Miles Travelled

California legislation, Senate Bill (SB) 743, signed into law by the Governor in 2013, changed California Environmental Quality Act (CEQA) requirements for analysis of a project’s transportation impacts on the environment under CEQA. The new law eliminates auto delay, level of service (LOS), and other similar measures of vehicular capacity or traffic congestion as a basis for determining significant impacts on the environment. As of July 1, 2020, SB 743 will require Vehicle Miles Traveled (VMT) to be the new analysis metric for determining impacts on the environment from transportation as part of environmental analysis required under CEQA.

To comply with the requirements of SB743 and CEQA, the City is developing TIA Guidelines for VMT that include methodology, threshold of significance, and mitigation measures for use in preparing traffic impact analysis in compliance with SB743 and CEQA requirements.


Public Meetings: The TIA Guidelines for VMT are scheduled to be presented at the following meetings:

  • April 21, 2020 Virtual Workshop (see presentation)
  • May 13, 2020 Planning Commission Meeting
  • June 17, 2020 City Council Meeting