california vehicle code section 40801
No peace officer or other person shall use a speed trap in arresting, or participating or assisting in the arrest of, any person for any alleged violation of this code nor shall any speed trap be used in securing evidence as to the speed of any vehicle for the purpose of an arrest or prosecution under this code.
That said, I remember a friend fought this once. A motorcycle officer gave him a ticket, and he investigated and found he had given hundreds of tickets from the same location. didn't help.
Perhaps I'm misunderstanding your point, but that does not constitute a speed trap. It very well could be that on that section of road there are just a lot of speeding drivers, and hence hundreds of tickets.
One example of a speed trap is if the speed limit takes a sharp drop without warning. For example, rural road with a 60 mph limit, and it drops to 25 mph at the town limits with no "25 mph ahead" signs, and there sits a cop with a radar gun ten meters after the "25 mph" sign.
1) is a section of highway where cops monitor cars entering and exiting, then calculate an average speed to identify people who were driving over the speed limit. Basically, they need to demonstrate instantaneous speed, not average speed, to write a ticket.
2) is a highway segment that hasn't set its speed limit based on an engineering/traffic survey done in the last 5 years, 10 if nothing nearby has changed.
Also, what laws could be changed to make it so (assuming that's a good thing). Examples: The government takes it directly from your bank account like they do if you don't pay your taxes. Another would be to use a progressive fine system like I've heard they have in some countries so that rich people don't feel like they can just pay the fines and ignore the law.
I have the highly controversial opinion that they should use civil asset forfeiture for some traffic violations. If a speed cam catches a car going over 100mph, it's a public danger, regardless of who was operating it. Sue the car, and allow the owner to recover the proceeds from the driver in a separate civil action if they can prove that another person was driving it. Only exception would be if they reported it stolen. Eventually the fine would be paid or the vehicle would be impounded for lapsed registration/insurance.