California Department of Transportation


Past Conferences


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The Research Connection

The Caltrans Division of Research and Innovation is hosting monthly videoconferences on various topics. The presentations are designed to bring researchers and practitioners together to exchange information and transfer knowledge.

Mr. Eric Schreffler
Philip Demosthenes
Senior Planner
Denver, CO

On Tuesday, June 24th, 2008, 9:30 AM - 11:30 AM, Mr.Philip Demosthenes presented "Why are Roundabouts Important."

Phil has over 30 years experience in transportation planning, policy and program development, roadway design, and traffic operation and safety. He is a recognized national expert in the field of access management. He created and then managed the Colorado DOT access control program for 24 years. He is active nationally with the Institute of Transportation Engineers and the Transportation Research Board (TRB), including the TRB Access Committee and the Committee on Eminent Domain and Land Use. He is a member of the TRB Task Force on Roundabouts, was chairman of the 2005 TRB National Conference on Roundabouts, and is the chairman for the TRB subcommittee on roundabout research. He has served on eleven technical panels of the TRB National Cooperative Highway Research Program. He has provided training and consulting services on roundabouts since 2002. He is currently a part-time instructor for the UC Berkeley, Technology Transfer program, co-teaching the Roundabout Design course. He has provided consulting services to over 14 states and five countries.

Topic Description: Why are Roundabouts Important

EDUCATION: 1973, Master of Fine Art, California Institute of the Arts, Valencia California, with major emphasis in studies of environmental and land use planning. 1971, Bachelor of Fine Art, California Institute of the Arts, with major studies in design and planning. Also attended University of California at San Diego and Santa Barbara, and Cañada College with studies in the sciences and the liberal arts.

AWARDS: 1999, recipient of the “Professional of the Year” Award from the Colorado/Wyoming Section of the Institute of Transportation Engineers. 1988, Recipient of the Dr. L. I. Hewes Award from the Western Association of State Highway and Transportation Officials.


Please click here for the presentation slides.

Please click here for the video presentation.