In a recent government meeting, city officials discussed significant updates regarding the evaluation of transportation impacts under the California Environmental Quality Act (CEQA). The focus was on transitioning from traditional congestion assessments to a more comprehensive approach that emphasizes vehicle miles traveled (VMT) as a key metric for environmental impact.

City staff announced plans to present a resolution next month aimed at refining the methodology used to study transportation impacts. Historically, the evaluation of projects included congestion metrics, such as traffic light wait times, but these are no longer considered relevant under CEQA. Instead, the emphasis has shifted to the total miles vehicles travel to reach project sites, a change mandated by the passage of Senate Bill 743 in 2013.

The VMT approach is designed to reduce greenhouse gas emissions by encouraging urban planning that promotes residential developments near shopping and employment centers. This strategy aims to facilitate alternative transportation modes, such as biking, walking, and public transit, thereby decreasing reliance on cars.

The city successfully adopted its VMT requirements by the state’s deadline of July 1, 2020, thanks to collaboration with the San Gabriel Valley Council of Governments. This partnership enabled the city to gather necessary socioeconomic data and develop sophisticated modeling tools. A VMT screening tool was also introduced, allowing project applicants to assess potential impacts effectively.

However, officials noted that the current computer simulation models are outdated and require an upgrade to a new activity-based model to enhance accuracy and effectiveness in transportation planning. This transition is expected to provide better insights into the impacts of new developments on the city’s transportation network.