When I initially designed the Police texture my thoughts were what you might find in rural Kentucky. Research threw up a myriad of designs, in part because of the different types of Police (state, county, metropolitan etc) but also the fragmented structure of Police forces in America.
Once Louisville makes an appearance this design will be more applicable. That's not to say the current one will stay white, depending on what Mash thinks and wants to do, a colour change may happen if it jars with the rest.
Also, for those raising concerns on wheel placement, they'll change. Some do clip the wheel arches at the moment as they're placed in code an not part of the car mesh export. It's on the task list, like shadows but performance, stability and functionality is priority atm.