As drivers adapt and unlearn bad habits of tailgating and accelerating through yellow and just-changed red lights, the initial increase in rear-end collisions as a percentage of intersection accidents drops off. Drivers running red lights decreases too. Since running red lights is major cause of intersection accidents, in general intersection accidents decrease as drivers learn to comply. The cameras cost money to install and increase in tickets costs administrative processing, but revenues from tickets offset that. Proper budgeting, matching revenues to costs, is all that's needed to make it a feasible and probably profitable initiative.