Alan C. Clark is Director of the Houston–Galveston Area Council’s (H-GAC’s) metropolitan planning organization (MPO), which is responsible for development of the region’s multimodal transportation plans and air quality programs. The MPO’s Transportation Policy Council approves the programming of all federal highway and transit funds in Harris County and the seven adjacent counties. Mr. Clark’s responsibilities also include coordinating the Houston–Galveston area’s response to mandates contained in the Clean Air Act Amendments of 1990. He has been a transportation planner with H-GAC since 1983 and has managed its transportation and air quality programs since 1986. Mr. Clark has served as an Adjunct Professor with Texas Southern University. Before coming to H-GAC, he worked as a transportation planner with the Metropolitan Transit Authority of Harris County and as a traffic engineering consultant. He currently serves on the advisory councils of the Texas Transportation Institute and the Center for Transportation Training and Research at Texas Southern University. In 2006 he was appointed to the Federal Advisory Committee for the U.S. Climate Change Science Program study on the Impacts of Climate Variability and Change on Transportation Systems and Infrastructure—Gulf Coast Case Study. Mr. Clark holds master’s degrees in civil engineering and in city and regional planning from Ohio State University. He completed his undergraduate degree in business administration at the University of Tennessee.

G. Edward Dickey is a consultant in water resources policy and planning; Senior Advisor providing policy, political, and technical advice and representation services on the planning and implementation of large-scale water projects at Dawson and Associates, a Washington-based representation firm; and Affiliate Professor of Economics at Loyola College in Maryland. He is former Chief of the Planning Division of the Headquarters Office of the U.S. Army Corps of Engineers and former Acting Assistant Secretary of the Army (Civil Works). Dr. Dickey has served on numerous NRC committees, including the Committee to Review the New York City Watershed Management Strategy, the Committee for the Study of Freight Transportation Capacity for the Next Century, and most recently the Panel on Adaptive Management for Resource Stewardship. He received PhD and master of art degrees in economics from Northwestern University and a bachelor of arts degree in political economy from the Johns Hopkins University.