On the police car debate: I was a fleet supervisor for many years and came to a few basic conclusions:
If one person drives and maintains a vehicle, it tends to be kept in a better state of repair than if it is driven by many different people. Just like your own car, you know what does not sound or feel right and get it fixed. This helps keep costs down by fixing the problem before it gets expensive.
Vehicles in use 24/7 tend to have a higher repair rate and cost to repair. Like us, they don't get a chance to rest. And the driver thought process is, let the next person take care of it.
It is less expensive to maintain than replace.
The program works, lets polish it up a little to make it better, but keep it in place.
Simon Berger, Greenacres