Co-director of the Active Communities Transportation (ACT) research group. He focuses on transportation research dedicated to building a more sustainable infrastructure, particularly in terms of improving road safety, active transportation, and transit-oriented communities. Other recent research topics involve transportation planning, congestion pricing, human behaviors, parking, and street networks. A native of Watertown, Mass., Marshall is a recipient of the Dwight Eisenhower Transportation Fellowship and winner of the Charley V. Wootan Award for Outstanding TRB Paper.
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