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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Announcing Safety Multipliers
What do San Francisco’s Van Ness BRT, New York’s congestion pricing, and Arlington’s intersection program have in common? Each pulls all three Safe System levers at once. We call that pattern a safety multiplier.
Marissa Aho Joins Fehr & Peers
As climate risk reshapes transportation planning, public agencies need strategies that connect resilience with everyday investment decisions. Marissa Aho, FAICP, brings decades of experience helping cities and regions turn climate risk into practical, fundable actions. Learn how her leadership expands our climate adaptation and resilience practice and strengthens the support we provide to communities.
2026 Staff Promotions
Join us in congratulating the 167 team members who earned promotions for their outstanding contributions this year.




