I recommend checking out the POI Factory website:  http://www.poi-factory.com/

Includes, for a paltry annual fee, or free to regular site
contributors, regularly updated speed & red light camera data.

 Among my favorite files are local eateries, truck stops, Beer Me USA,
(important!) camping, rest areas, dump stations, offbeat places to
visit, yada yada.

 The only red light cameras I've encountered over the years are right
here in Atlanta, and we have _never_ been alerted to the presence of
speed cameras.  For radar & laser detection, I rely on Valentine One.
http://www.valentineone.com/

George/ATL