Prof. Hartgen is a Professor in the Department of Geography and Earth Sciences. He received his Ph.D. from Northwestern University in 1973 for Transportation Planning. He is author of over 300 publications in transportation planning and policy, and is the US Editor of the International Journal of Transportation. His recent studies include comparative studies of highway and transit systems, impacts of electric and natural gas vehicles, economic impacts of transit and road proposals, economic impacts of airports, the motor sports industry, Charlotte traffic and transit service, site development, and commercial development at rural Interstate exits. His research regularly blends geographic principles, GIS, and spatial competition with transportation access and performance.