Are unmarked police cars legal in Massachusetts?

Is it legal for cops and officers to drive unmarked vehicles?

You can therefore be pulled over in an unmarked police car, because the law's interpretation is not clear. It is against the law in most jurisdictions to use lights or sirens except for police officers (or other first responders).

Unmarked police cars are illegal in Washington State? Seim lives in Washington, where unmarked police cars are illegal unless they're specifically designated for "undercover" or confidential investigative purposes. Officers can't drive unmarked vehicles to pull people over for minor offenses.

Unmarked police cars are illegal in Illinois.

The same rules apply to all Illinois police officers, regardless of whether they are state or local. An unmarked cop car is one that has no distinctive identifiable marking, but may have portable emergency warning lights. "

Are you required to stop for unmarked police cars in the UK?

Unmarked police cars can stop vehicles, but they must be accompanied by a uniformed constable to ensure compliance with the law. Unmarked cars flashing to you to pull over and stop should not be stopped unless you can confirm it is police.