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CAR OWNERS IN San Francisco fed up with parking tickets had a brief moment of respite on Tuesday thanks to a website called Find My Parking Cops. The site kept tabs on where city workers were issuing tickets, showing the locations of parking control officers on a city map in real time.

I’m using the past tense to tell you about it because shortly after the site went live, the real-time data feed powering it went dark.

Before that sad turn of events, and while the buzz around the site was still high, I spoke to the creator, Riley Walz, about how he put it together. Walz is a software engineer known for building stunty websites. He got the idea for this one after looking at all of the information listed on the parking tickets issued by the San Francisco Municipal Transportation Agency. Each ticket shows the make of the car, the license number, and so on. But right at the top is the ticket’s citation number.