In Ohio, traffic cams were sold as a safety measure...but of course, they were a revenue generating scam...

The intent of the traffic cameras was to increase revenue

October 21, 2009
[link to www.chillicothegazette.com]

In the attempt to convince the voting public that safety was the prime concern for installation of the speed and red-light cameras, Chillicothe City Council and Mayor Joe Sulzer neglected to look beyond dollar signs to realize drivers who violate traffic laws will not let photo cameras deter them from doing so.

Yes, some will alter driving habits to conform at intersections with cameras but show total disregard for traffic laws at all others. This would simply transfer the "safety" factor to an additional but separate location. Cameras won't correct that. On the other hand, maybe they did see far enough ahead to anticipate that it would be a profitable solution. More cameras, maybe?

Apparently, the intent of photo enforcement of traffic laws was to increase revenue to Chillicothe. (More at posted link...)