A StreetsBlog article about the evolution of mandatory parking requirements noted that recommendations put forward long ago by Distinguished Research Professor of Urban Planning Donald Shoup are now gaining wide acceptance. Shoup recommended removing off-street parking requirements, allowing developers and businesses to decide how many parking spaces to provide for their customers. He also recommended pricing on-street parking so that one or two spaces will always be left open in order to avoid parking shortages. Finally, he suggested spending parking revenue on public service projects on the metered streets, which would help increase the popularity of demand-based pricing. Many local governments are taking these recommendations seriously and implementing changes. The article cited Associate Professor of Urban Planning Michael Manville‘s research on San Diego’s 2019 decision to stop requiring parking for housing near transit, which helped make affordable housing projects more economically viable. As Shoup predicted, parking requirements are quickly being eliminated across the United States.