Daryl Zerfass

Principal, Transportation Planning & Traffic Engineering

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A transportation engineer and planner with more than 35 years of experience, Daryl delivers traffic and mobility solutions that support land development, environmental review, and community growth. He specializes in transportation impact studies, bringing a practical, outcomes-focused approach that helps projects move from concept to construction to thriving community.

Daryl is passionate about work that makes a visible difference—whether improving mobility through active transportation networks or enabling much-needed housing. His portfolio spans projects from local development initiatives to large-scale planning efforts. This includes the long-running Newhall Ranch community in Los Angeles County, where he has supported phases of the project from early planning through active construction for over 20 years.

Outside of work, Daryl enjoys traveling with his wife in their RV, exploring national parks, hiking, and learning about the history of the places they visit.

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