In Honolulu, the more senior police officers are provided with a vehicle subsidy and they use their personal cars on duty. They have a list of acceptable vehicles that they can use, one of which is the 4Runner.
The 4Runner is one of the more popular choices. They mount a blue strobe light on the roof (though there is also a low-profile LED light bar that they are also using now). Both are on removable roof bars and not bolted down.