Explore the Planning Advisory Service (PAS) Memo
State-of-the-practice analytical methods should be employed when estimating the trip generation of mixed-use projects. Our recent update and revalidation of MXD+ provides planners with a method more accurate than ever for performing such estimates, which are a critical part of the land use development and environmental review process. In the November/December 2020 issue of the American Planning Association’s PAS Memo, entitled “Still Getting Trip Generation Right: Revalidating MXD+,” Principal John Gard and Transportation Planner Corwin Bell describe the advantages, analysis techniques, and use of MXD+ through actual site case studies. We invite you to read the details in the memo and reach out to us with questions or discussion.
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VMT Implementation Steps
Compare the implementation of VMT Banks, VMT Exchanges, and VMT Impact Fee Programs through practical flowcharts outlining key decisions, legal requirements, agency coordination, environmental review, and long-term administration. This resource helps public agencies, regional partners, and development teams evaluate which VMT mitigation approach best fits their community’s goals.
Come Find Us at TRB 2026
At the 2026 TRB Annual Meeting, our team will share insights on topics ranging from the Safe System Approach to supply chain challenges. We’ll also participate in the career fair.
What Seattle’s Travel Trends Reveal About Post-Pandemic Mobility
The 2023 Puget Sound travel study revealed notable changes in how people get around. Our team identified emerging trends that may hold lessons for other regions.




