I believe the impound system is currently flawed.
Suggestion: Make it to where there is a K menu option for cops to mark a vehicle for impound. This will make it to where abandoned vehicles will be impounded. Give the ability if the car is park after marked for impound, than it is cleared (such as someone headpoped and wasnt screwed).
Reasoning: Due to Tsunami, I think it is bad for Role play to end a situation because we have to park our car otherwise it will get impounded, or your car parked normally poofed and wasnt parked.
Additional: It would give police something to do, could also create another tow script or something to create a tow job in the city that was interactive, allowing those workers to also mark for impound.