I don't know why you'd think it couldn't be greater than the cost, either. It takes, what, five minutes to write a ticket, which might average $100? That's $1,200/hour of revenue. No way the officer costs that much, even including benefits and equipment. Most people just pay tickets, they don't contest them, so court costs will be small.
California even has a law preventing cities from creating these kinds of local vehicle code laws that could generate local revenue.
The 'unofficial' policy of parking enforcement here is to ticket everything you see, regardless of whether or not the car is actually in violation of something.
They know it's far cheaper for drivers to just pay the fines than it is to fight the tickets. Arguing a parking ticket can literally take several entire days. Forget just contesting them in writing, the written appeals are automatically denied every single time. I don't even think anyone reads them, there's probably just some flunky at a desk who opens them and immediately sends them back with a pre-printed denial letter.
It's what I'm doing in Chicago, and it's actually not as much money as you'd think it is. Don't get me wrong, it's still a lot and is about as predatory as it gets, but it's not in the billions, compared to many other things.
Of the parsable ones I have, the total since 2009 up until March of this year, there's been a total of $764,775,070 marked as "paid". Tickets marked with a bankruptcy flag has added up to 18,433,390.0.
Wanted to finish up some code to get better output, but I have to run.
Of course I just paid it.
i've heard about a couple of apps for this sort of thing, e.g. http://www.parksafela.com
That said, 5 minutes per ticket pretty much requires offenders to present themselves in a nice, orderly line. A more normal scenario where the officer has to cruise around, pull someone over, get out, talk to the person ("no no, I'm not passing through, my sick uncle lives over there"), write the ticket and get back in the patrol car, I'd guess closer to 15 minutes as a lower bound.
Also, doesn't Waze have a feature where you can warn other driver against this kind of thing? That would further reduce the ticket-rate.
Officers get exactly that when they set up shop in a place where they know there are going to be plenty of violators. Highway 66 inside of the DC beltway is HOV during rush hour. The police will just sit at the end of the on ramp and write tickets for everyone trying to cheat HOV or with expired tags or inspection. Makes for a great haul, especially because HOV tickets are $125 for the first offense, $250 for the second, $500 for the third, and $1000 for the fourth.
No real reason to make a DUI checkpoint in the end of a cul-de-sac, is there?
At the very least, it might be paying for itself....
economies of scale!