Earlier quoted context omitted.
You can't ticket your way out of this problem - nor can you afford to over long periods of time. Stationing cops in enough places to actually discourage speeding is not practicable. There are fortunately lots of ways to fix this without stationing a cop every few blocks. Speed bumps are common, but imperfect. In my hometown on smaller residential streets struggling with too much through-traffic they've put traffic ci…
I totally agree with the approach you've described. Ticketing is only the first step, a temporary solution that highlights unacceptable (to local residents) traffic patterns to the local government. Waze and its user are surfacing inefficiencies in how traffic patterns have been engineered. Though it'll take time for communities to plan and implement solutions, these are definitely solvable problems.
By default yeah, but it doesn't have to! I think a lot of places get into a problem where perfect is the enemy of good - they hold off on traffic calming projects because of cost. Narrowing a road by constructing new sidewalks is expensive, after all.
But you don't need to do it perfectly - New York City redesigned vast portions of of its streets using nothing more than paint and traffic cones. No concrete needs to be poured nor streets torn up to get the process started - and even better, because these changes are fully reversible, they can often be implemented quickly without the usual multiple rounds of bureaucracy.
In NYC the redesign of many streets was simply done by the city, and kept permanently once the quantified results proved the efficacy of the setup. Easier to ask forgiveness (especially when you have hard data) than permission and all that.