Donald Curran Shoup (born August 24, 1938) is a professor at the University of California, Los Angeles and widely-regarded expert in the economics and availability of parking. His 2005 book The High Cost of Free Parking identifies the negative repercussions of off-street parking requirements.
Early life and career
Shoup was born in Long Beach, California in 1938. As a two-year-old, his family move to Hawaii for his father's work in the U.S. Navy. He arrived in New Haven, Connecticut in the late 1950s, at the peak of New Haven Mayor Richard C. Lee's efforts to build major parking garages and improve city traffic flow with the Oak Street Connector and other urban renewal projects. He received his undergraduate degrees from Yale College in electrical engineering and economics, and a doctorate in economics from Yale in 1968. After completing his PhD he headed west, assuming a post as research economist at UCLA's Institute for Government and Public Affairs. After a four-year stint as a professor at the University of Michigan, Shoup returned to UCLA as an Associate Professor of Urban Planning in 1974, and later was awarded a full professorship in 1980.
Originally focused on public finance and land value theory, in 1975 Shoup was inspired by a master's thesis that found that Los Angeles County employees were almost twice as likely to drive alone than federal employees in the Los Angeles Civic Center due to the availability of free parking. He has extensively studied parking as a key link between transportation and land use, with important consequences for cities, the economy, and the environment. 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.
Shoup popularized the theory that an 85% occupancy rate of on-street parking spaces would be the most efficient use of public parking. When cars at any given destination in a city (a block or group of blocks) occupy more than 85% of on-street parking spaces, then cars arriving at that destination are forced to circle the block for a few minutes in order to find an unoccupied parking space. This small search time per car creates a surprisingly large amount of traffic congestion, because typically, many cars are searching for parking simultaneously during peak driving times. This wastes time and fuel and increases air pollution. Shoup calls the phenomenon of excess driving as a result of under-priced parking as "cruising for parking".
Shoup's attempts to turn theory into practice have, on occasion lead to controversy.
Shoup is a Fellow of the American Institute of Certified Planners, and has served as Director of the Institute of Transportation Studies and Chair of the Department of Urban Planning at UCLA. He has served as a visiting scholar at the University of Hawaii, Cambridge University and the World Bank 
- Shoup, Donald and Ruth P. Mack. Advance land acquisition by local governments: benefit-cost analysis as an aid to policy (1968). Institute of Public Administation.
- Shoup, Donald and Don Pickerell. Free Parking as a Transportation Problem. (1980). U.S. Department of Transportation
- ——. Evaluating the Effects of Parking Cash Out: Eight Case Studies. (1997) California Environmental Protection Agency.
- ——. Parking Cash Out. (2005). APA Planning Advisory Service.
- Shoup, Donald. The High Cost of Free Parking. (2005) APA Planners Press. ISBN 978-1884829987 (Revised 2011. ISBN 978-1932364965)
- Shoup, Donald. "The optimal timing of urban land development." (1970). Papers in Regional Science 25(1), 33-44.
- Shoup, Donald, with Ronald Wilson. "Parking subsidies and travel choices: assessing the evidence." (1990). Transportation 17 (2), 141-157
- Shoup, Donald. "Cashing out free parking." (1982). Transportation Quarterly 36(3)
- "An opportunity to reduce minimum parking requirements." (1995). Journal of the American Planning Association 61(1), 14-28.
- "In lieu of required parking." (1999). Journal of Planning Education and Research 18(4), 307-320.
- "The trouble with minimum parking requirements." (1999). Transportation Research Part A: Policy and Practice 33(7), 549-574.
- "Cruising for parking." (2006). Transport Policy 13(6), 479-486.
- Hartocollis, Anemona (2005-03-27). "No Parking. You're Welcome.". The New York Times. Retrieved 2009-08-11.
- Groves, Martha (16 October 2010). "He puts parking in its place". Los Angeles Times. Retrieved 26 April 2015.
- "Faculty biography". University of California, Los Angeles. Retrieved 25 April 2015.
- Shoup, Donald. "Curriculum vitae" (PDF). University of California, Los Angeles. Retrieved 26 April 2015.
- Gardetta, Dave (1 December 2011). "Between the Lines". LA Magazine. Retrieved 25 April 2015.
- Gordon, Rachel (2010-07-27). "High-tech parking meters premiere in S.F.". San Francisco Chronicle. Retrieved 2010-07-27.
- Proposed parking fees find few fans By Chet Barfield, San Diego Tribune