Ok since I somewhat started this whole discussion by bringing up all of the benefits of camera enforcement for non-car people, we should highlight the benefits for drivers too. Off the top of my head I can think of:
- fewer blocked boxes & better intersection throughput and flow of cars
- more consistent travel speeds between different cars, better flow of traffic, higher road throughput, less congestion and traffic (see
https://policy.tti.tamu.edu/strategy/variable-speed-limits/#:~:text=Contrary to what one may,go conditions to a minimum.)
- better fuel economy from lower speeds (yes, driving slower saves gas) and better flow of traffic (less braking and acclerating)
- fewer high-speed accidents (car vs car but also liability costs from car vs anything else). Safer roads and fewer injuries and deaths
- lower insurance premiums from fewer claims and lower repair costs (low-speed accidents are cheaper, and less energy to absorb)
- lower maintenance costs from reduced wear and tear on engine and brakes, from reduced acceleration/deceleration
- less distracted driving as people pay attention to speed & red lights more readily, resulting in less road rage, fewer close-calls, etc.
- (minor) mode shift of other people driving less or choosing non-driving alternatives results in less congestion and traffic, greater ease finding parking
- fewer police interactions and traffic stops as officers are freed up to do other types of enforcement
- driving feels less "scary" so more people (elderly people, teens, people who don't drive regularly or aren't comfortable driving) can comfortably travel via car, resulting in greater mobility for these vulnerable groups
- maybe, just maybe, being a decent human and reducing the risk of killing someone with your car and dealing with the emotional trauma of that
All of this with the possible downside being MUH FREEDOM and 2) maybe SLIGHTLY increased travel times from not being able to speed excessively (again this is >10mph over the limit) and blow through red lights. However in city driving, the travel time is mostly determined by congestion + waiting at red lights, not the top speed you reach. The increased travel times from slower speeds and red lights could very possibly be offset by the reduced congestion/improved road throughput highlighted above though, so it's not even clear if this downside exists at all.