Senate Bill 743, passed on September 27, 2013 directs the Governor’s Office of Planning and Research (OPR), in part, to prepare revisions to the CEQA Guidelines establishing criteria for measuring the significance of projects’ transportation impacts. OPR has produced a Preliminary Evaluation of Alternative Methods of Transportation Analysis, which develops those recommendations by exploring new ways to measure environmental impacts related to transportation. The goal of the new transportation-impact metrics is to both reduce environmental review costs and achieve better economic, health, and environmental outcomes from such review.

Currently, CEQA review of transportation impacts uses the Level of Service (LOS) metric, which focuses on vehicle delay at intersections and on roadways. Mitigation measures to increase traffic flow typically involve increasing the capacity (i.e., width) of the intersection or road, rather than encouraging alternate lower-emission forms of transportation. LOS has thus been criticized as working against state goals like GHG emissions reductions, infill development, and multimodal transportation networks. Other criticisms of the metric are that LOS is difficult and expensive to calculate; LOS measures motorist convenience rather than physical impact to the environment; and LOS skews environmental priorities by characterizing bicycle and pedestrian improvements as detrimental to transportation, thereby discouraging more environmentally friendly modes of travel.

SB 743 requires OPR to provide non-LOS evaluation methods for transportation impacts. These criteria must promote the reduction of greenhouse gases and the development of transportation networks, particularly in areas with transportation infrastructure already in place. The most important way in which SB 743 facilitates achievement of state goals is that once the new criteria are in place, LOS-measured traffic will not be considered a significant impact on the environment. The bill does not limit the type of projects to which the new transportation criteria would apply.

OPR’s preliminary evaluation studies a number of suggested alternative measures of transportation impacts including vehicle miles traveled per automobile or per capita, automobile trips generated, fuel use, and motor vehicle hours traveled. The agency’s analysis highlights the difficulty of using each metric and identifies which mitigation measures and project alternatives might result from the use of each metric.

Comments on the proposed metrics are due by February 14, 2014 to [email protected]. OPR must produce a draft of the Guidelines revisions by July 1, 2014.