This app was mentioned in 1 comment, with an average of 10.00 upvotes
I'm interested to see what comes of this. I airways use NavSpeedo which overlays the GPS speedometer on the map. It's not sure camera alert but it's something.
I use Waze when traveling the motorway for police alerts, it's fantastic! Navspeedo: https://play.google.com/store/apps/details?id=com.ventel.android.navspeedo