http://www.trapster.com/

I started using this but noticed there wasn't a lot of support. It relies on its users to report speed traps, redlight cameras, and police cars in the area.

I was hoping to get more members to join so i can possibly avoid another $400 ticket.

I'm not affiliated with the website but i found it somewhat useful. It should get better with more users. I use the same screen name on it.