Donald Shoup has extensively studied parking as a key link between transportation and land use, with important consequences for cities, the economy, and the environment. He is best known for his 2005 book The High Cost of Free Parking.
His research on employer-paid parking led to the passage of California's parking cash-out law, and to changes in the Internal Revenue Code to encourage parking cash out. His research on municipal parking policies has led cities to charge fair market prices for curb parking and to dedicate the resulting meter revenue to finance added public services in the metered districts.
Professor Shoup is a Fellow of the American Institute of Certified Planners. He has been a visiting scholar at Cambridge University and the World Bank, and has served as Director of the Institute of Transportation Studies and Chair of the Department of Urban Planning at UCLA.