With nearly two decades of experience as a transportation planning researcher and practitioner, Joh oversaw the once-a-decade Regional Travel Survey for the National Capital Region. He has nearly two decades of experience working with transportation and household travel surveys. Joh oversaw the once-a-decade Regional Travel Survey, which collected detailed demographic and travel behavior information from about 16,000 households, the largest household travel survey ever conducted for the DC region. He has provided technical oversight and expertise on other key transportation projects. He currently serves as secretary of the Accessible Transportation and Mobility Committee and a member of the Travel Survey Methods Committee of the Transportation Research Board (TRB).
Joh has extensive academic experience and has published nearly two dozen articles in leading urban planning journals and has taught over 20 graduate and undergraduate courses. He has advised over 50 graduate students on professional projects that led to job placements in the field of transportation planning.
He holds a Doctorate of Planning, Policy, and Design from the University of California at Irvine, a Master of Urban Planning from the University of California at Los Angeles, and a B.A. in Political Science from the University of California at San Diego.