Is it legal for traffic police to check cars without roadblocks?

Legal analysis: illegal, traffic police need to set up roadblocks and signs in some cases.

According to the law, in addition to carrying out special tasks such as intercepting serious violent criminal suspects, intercepting and inspecting vehicles or punishing traffic violations in places that do not hinder road traffic and safety, a diversion or avoidance sign should be set in the direction of incoming vehicles.

Legal basis: Article 73 of the Code for Law Enforcement of Traffic Police on Road Duty shall observe the following provisions when investigating and handling illegal acts:

(a) in addition to intercepting serious violent criminal suspects and other special tasks, intercepting and inspecting vehicles or punishing traffic violations should be carried out in places that do not hinder road traffic and safety, and signs of diversion or avoidance should be set in the direction of incoming vehicles;

(2) If a motor vehicle driver refuses to stop, he shall not stand in front of the vehicle and forcibly intercept it, or trample the vehicle, put his head and arms into the cab of the vehicle or climb the vehicle, and forcibly order the motor vehicle driver to stop;

(3) Except that the driver of a motor vehicle may pose a serious threat to public safety and the life safety of others after driving away, the traffic police may not drive a motor vehicle to catch up, and may take measures such as informing the traffic police on duty ahead to intercept or write down the car number and pursuing legal responsibility afterwards;

(4) Interception of vehicles should adopt indirect interception methods, such as setting up traffic facilities and using traffic lights to control parking in front of intercepted vehicles. Do not stand in the lane of the intercepted vehicle to intercept the vehicle.