As a practical matter, there is little or nothing you can do if the town itself will not enforce the parking and traffic safety laws. Clearly, they could, if they chose: what you describe violates any number of traffic laws and the town could giving out moving violations for unloading passengers in the middle of an intersection (reckless or careless driving, for example) and could ticket anyone parking illegally. But if the town police refuse to do this, there is no other agency to enforce those laws locally. All you could do is try to exert political pressure (e.g. try to elect candidates to town council who will take the laws more seriously).