The police car can stop at will when the traffic police are on duty.

You can park temporarily, but you must ensure safety. The traffic police on duty can drive a police car, a private car or arrive at the law enforcement site by other means. If you are driving a police car, you can enforce the law on the premise of ensuring safety; However, after the private car drives to the scene, it cannot be parked illegally, and it must be parked according to law. Legal basis: Notice of the Ministry of Public Security on Printing and Distributing the Law Enforcement Norms for Traffic Police on Road Duty Article 69 Traffic police should observe the following safety protection regulations when on duty on the road: (1) Wear uniform reflective vests; (2) When driving a police car on patrol duty, turn on the warning lights, and keep the speed and distance of vehicles in accordance with the regulations to ensure safety. Drivers and passengers should wear seat belts. When driving a motorcycle to patrol, you should wear a standard helmet; (three) to keep the information flowing and obey the unified command and dispatch. Article 70 Duty on urban expressways, main roads and expressways shall be performed by two or more traffic policemen, or by a traffic policeman leading two or more traffic assistants. Need to set up duty points, should be based on road conditions and traffic conditions, temporarily choose a safe place that does not hinder the passage of vehicles, at least 200 meters away from the duty point, put warning signs that require drivers to stop for inspection, start to put luminous or reflective warning signs and warning lights, and set safety protection equipment such as deceleration warning signs and reflective cones at intervals. Article 71 If a police car needs to be parked temporarily when performing official duties, it shall turn on the warning light and choose a safe place in the same direction as the disposal place, and shall not interfere with the normal traffic order. When the police car is temporarily parked on the expressway, the warning light should be turned on, and the police car should be parked at the disposal site 50 to 200 meters away from the oncoming vehicle according to the road speed limit. The alarm can be turned on without affecting the production and life of the surrounding people.