SB743/TIS Guidelines

Recent changes have resulted in the need to update how the city evaluates impacts to the city’s transportation network. These changes, largely in response to Senate Bill 743 (SB743), necessitate the development of SB743 Guidelines and the update of the city’s Transportation Impact Study (TIS) Guidelines to ensure development review is consistent with SB743 and CEQA.

The City is soliciting feedback on the DRAFT TIS Guidelines Update and SB743 Guidelines. In early 2021, city staff will present updated TIS Guidelines and SB743 Guidelines for consideration by the Planning Commission and adoption by the City Council.

Summary of Proposal

TIS Guidelines

Since 2013, the city has relied on the existing TIS Guidelines to guide Transportation Impact Studies (TIS) for new development projects in the City. Since that time, numerous technological advances, changes in law, and changes in engineering practice have occurred. The proposed changes are intended to update the TIS Guidelines to reflect these changes as well as comply with SB743.

The proposed TIS Guidelines are shown in Exhibit A. For ease of use, the proposed changes from the existing TIS Guidelines are shown in redline/strikeout format in Exhibit B. To access documents click on Exhibit links above.

SB743 Guidelines

In 2013, the State of California passed Senate Bill 743 (SB 743), which altered how transportation impacts from new development are measured under the California Environmental Quality Act (CEQA). Traditionally, transportation impacts have been assessed in terms of Level of Service (LOS), a measure of automobile delays along a roadway. SB 743 shifts from LOS to metrics aligned with state goals around greenhouse gas reduction, land use diversity, and development of multi-modal travel networks.  

The law stipulated that starting on July 1, 2020, automobile delay and LOS may no longer be used as the performance measure to determine the transportation impacts of land development projects under CEQA. Instead, an alternative metric that supports the goals of the SB 743 legislation will be required. In this case, Vehicle Miles Traveled (VMT) was determined by the state to be the most appropriate metric.

The SB743 Guidelines provide CEQA thresholds of significance for VMT as well as provide guidance for the evaluation of projects under SB743. This includes exemptions, screening maps, and outlines the technical process for evaluating VMT. To view DRAFT SB743 documents click the following link: 

Comments and Questions

If you have comments or questions about the DRAFT documents , email Casey Kempenaar, Planning Manager at .