I got nailed this past spring when I parked my bike 90 degrees to the curb. I'd seen another bike park there the same way a number of times, but I got a ticket after a couple hours. I repositioned it so it was about 60 degrees and I was fine after that as well as on subsequent occassions. It was a test on my part to see what would happen and of course, it happened. What ticked me off though is that the "voluntary payment" is no longer, and the ticket was a set $30 instead of the old $20.

Tim