Used to have speed camera detectors, but now I use a free app on my phone called Waze. I'm sure many of you have heard of it. It's primarily a navigation app owned by google, with very up to date traffic info obtained from everyone else using the app. It will monitor the road ahead even if you don't have a destination set. Showing your current speed and limit, speed cameras and more. It's community driven, so all the speed camera sites are kept up to date. You will also get notified of police (potential speed trap), broken down vehicles, accidents, etc. too.