Walz got the idea when he was playing around with the payment site after his roommate got a parking ticket. “But my friends do and I know that parking tickets are kind of notorious in this city.”Using his roommate’s citation number, Walz identified the numbers of subsequent tickets, as they all follow the same pattern. I reverse engineered the San Francisco parking ticket system. pic.twitter.com/67MOWVMleF — Riley Walz (@rtwlz) September 23, 2025Walz also created a leaderboard that tallies the total value of parking tickets issued by each officer. The site had more clicks than documented parking tickets in its first day —over 50,000 views.