Even a pending FQ reply, I can vouch that City/County LEO's are given the option to drive their squad cars home, and subsequently to any other "off-duty" job,..great to be in a union,....plus free gas...
Many Cops nationwide do moonlighting.
Church traffic.
Funerals
Escorts
Security
But I can't tell you the number of times, a city cop will turn on his lights, go through a red light, than turn the lights off...
Perks of the job,....But 120mph on the Turnpike,....

? Bad Idea.... FHP will nab your ass...They don't care if your the mayor, FBI, local LEO, City Commissioner, State Rep. etc,...
You are not in Code 3 (lights & siren),....and driving like a madman? You go down, courtesy of FHP. They had some super tweaked out Mustang 5.0 LX's back in the day...They got tired of being out run.....(before helicopters),...they got the Winston Cup additions, and were on Sawgrass Expressway, clocking 175 mph...back in the day.
I wouldn't doubt those Crown Vic's (with the Police Interceptor Emblem) get 150mph no problem.(and now they have helicopters),...