Upon news of his passing, social media posts and tributes to Shoup have been pouring in. A selection:

“Donald’s curiosity, intelligence, passion, generosity and kindness allowed him to not only expose the critical problems with modern parking policy, but to also ignite and nurture a movement to change them and make the world a better place.” — Parking Reform Network

“Everything he did, he did well because he would research exactly how to do it and what he should be doing.” — Pat Shoup, Don’s wife of nearly six decades, in the Daily Bruin

“As he gathered up jaw-dropping data and orthodoxy-shattering insights about parking, his work eventually started to reshape the way cities function and feel.” — Wall Street Journal

Shoup’s “provocative and occasionally amusing 734-page treatise on the economics of parking sparked reforms in thousands of cities, helping reduce traffic, create green space and make cities more walkable.” — New York Times

“Ideas are only any good if there are people to put them into practice. … We should all be so lucky, when our time on the meter runs out, to leave a legacy like his.” — Henry Grabar, author of “Paved Paradise: How Parking Explains the World”

“The beauty of the Shoupian worldview is that it both explains the dire condition of so many cities and plots paths to recovery.” — William Fulton, California Planning and Development Report

“The UCLA urban-planning professor … was not merely the top scholar in his field but its Elvis and its Lennon and its Jagger, all bundled into one tweed sport coat.” — Curbed

Arbitrary parking minimums, Shoup thought, “were clearly a product of the reptilian cortex, the most primitive part of the brain, and they well deserved one of the best of his large collection of puns: ‘Aparkalypse Now!’ ” — The Economist

“Shoup has a strong claim on being the scholar who will have had the greatest impact on your day-to-day life, radically changing how we approach the unglamorous problem of how and where we park our cars — and, in turn, where we can live, how we move about and the form our cities take.” — Nolan Gray, UCLA Luskin PhD student and author of the book “Arbitrary Lines: How Zoning Broke the American City and How to Fix It”

“I think that parking is important for all of you. That the average car is parked 95% of the time. And some of your listeners were probably even conceived in a parked car.” — Donald Shoup in a 2005 NPR audio clip, shared in a remembrance on All Things Considered

“I read Professor Shoup’s work when I was in planning school, and his research on parking completely opened my eyes. Now, I have the privilege of working on policy directly related to parking, transportation, and land use in Los Angeles with a handful of Shoupistas on my own staff, some who studied directly under him.” — Los Angeles City Council member Nithya Raman

“His legacy looms large over the transportation strategies for L.A.’s megaevents. … The fact that L.A. could even aspire to host a ‘car-free’ games owes a great debt to Donald Shoup repeating, for decades, that just because you’re going somewhere in this city, you’re not automatically guaranteed a free parking spot when you get there.” — Alissa Walker, Torched

“Over more than a half century of clear writing, clever quips and exhaustive scholarship, Donald Shoup became one of the world’s foremost experts and influencers on a topic seemingly as mundane as it is universal: parking.” — Los Angeles Times

” ‘The High Cost of Free Parking’ made parking interesting and explained how it is vitally important. It kicked off an era of parking reform that is helping to remake cities and suburbs throughout America.” — Robert Steuteville, Congress for the New Urbanism

“Through his work on parking, land use and transportation, he literally reshaped the landscape of cities across the world and here in Westwood, where he lived and worked for decades.” — North Westwood Neighborhood Council

“Farewell to our friend Donald Shoup, the guru who showed how parking can make and break a city. He was decades ahead of his time and we’re still trying to catch up with him. The legacy of his life and his times will never expire.” — Janette Sadik-Khan, former New York City Department of Transportation Commissioner

“Donald Shoup explained to Americans the high cost of free parking, showing the way toward more walkable downtowns and affordable housing. … Through his intellectual leadership, the trend of subsidizing cars at the expense of people is beginning to buckle.” — U.S. Rep. Jake Auchincloss (D-MA)

“Donald Shoup may have spent more time thinking about parking than anyone in the United States. … He focused on the problem of how to price parking spaces in downtown areas to make cities more vibrant and attractive places.” — News Center Maine