Transportation Impact Analysis Guidelines

Los Angeles County's new Transportation Impact Analysis (TIA) Guidelines utilizing the Vehicle Miles Traveled metric are available here.

Please note TIA Guidelines Page 7 of 34 has been updated as of 9/2/2020.

If you have any questions about the TIA Guidelines, please contact:

Jeff Pletyak
(626) 300-4721
jplety@dpw.lacounty.gov

Or

Kent Tsujii
(626) 300-4776
ktsujii@dpw.lacounty.gov

Please see the links below for reports referenced in the TIA Guidelines.

• Governor's Office of Planning and Research (OPR), Technical Advisory on Evaluating Transportation Impacts in CEQA, December 2018
• California Air Resources Board, 2017 Scoping Plan-Identified VMT Reductions and Relationship to State Goals, January 2019
• Los Angeles County Senate Bill (SB) 743 Implementation and CEQA Updates Report, Fehr & Peers, June 2020
• CAPCOA Quantifying Greenhouse Gas Mitigation Measures, August 2010