Some comments from 25 years of enforcement experience, in no particular order .... This is a generalization, but I've spoke with many cops in many states and these are fairly common observations:
- LE agencies are just as diverse as any group of people; there are good ones and bad ones, forward thinking and backward thinking, well funded and poorly funded, respected and disrespected, etc ... And so "enforcement" is an output of many inputs.
- traffic enforcement is a function of available resources, time and prioritization
- there are often federal grant programs which have lots of money available for specific traffic enforcement, but many agenicies do not apply because they either are unaware, or unwilling to limit themselves to the conditions of the grant
- as a generalization, it is a misconception to believe that LE agencies directly get money derrived from traffic tickets. In fact, there's a very good reason NOT to tie tickets to revenue, as agencies would then be biased in traffic enforcement, likley over-zealous. Typically most states break down the "ticket" money into court costs and fines. The court costs are often a fixed rate; typically set by the state legislature. The "fine" is up to the judge, and may or may not have a min or max depending on state law. The "fine" would be directed to whatever each state protocol decides is appropriate; might go to the city, county, town, whatever ...
- prosecutorial entites often have skin in the game, as they can "defer" a ticket for a "fee". Rather than prosecute the ticket, they hold it in limbo for a year, and as long as you don't get another violation, it is dropped while never having gone to court. While this seems like a scam, it's actually beneficial for the tax payer, as these "fees" are kept in the Prosecutor's funds, which help offset the incredibly expensive costs of high-profile cases such as murder, rape, etc.