Show HN: Calculate the chance of a parking ticket anywhere in San Francisco

My girlfriend just parked on a nearby street and she had a spot right next to her, but had to move in 2 hours. So we took the chance and moved the car, but it was still close, so she could get a ticket.

If I had known about this, we would have used it! And oh, look at that. 1% chance of a ticket. awesome.