Traffic police usually ask for ID card, driver's license and driving license when checking cars. In addition to the need to show three certificates, sometimes the traffic police will also carry out the following inspections:

1, ask the driver's name, date of birth, address and other related information.

2. Check the type, color and number plate of the leaves on the driver's license with the vehicle.

3. Check the vehicle conformity signs and environmental protection signs.

4. Inquire about the illegal behavior of the vehicle and the driver, as well as the driving score, and whether there is a criminal record.

Notice of the Ministry of Public Security on Printing and Distributing the Code for Law Enforcement of Traffic Police on Road Duty Article 42 Traffic police shall follow the following procedures when investigating and handling illegal acts of motor vehicle drivers:

(1) Salute the drivers of motor vehicles;

(two) command the motor vehicle driver to pull over immediately, and as the case may be, ask the motor vehicle driver to turn off or get off;

(3) Informing motor vehicle drivers to produce relevant certificates;

(4) Examining the motor vehicle driver's license, asking the driver's name, date of birth and address, and checking the appearance of the holder with the photos on the driver's license; Check the motor vehicle driving license, check the model, color and number plate; Check the inspection marks and insurance marks; Inquire about the illegal behavior information of motor vehicles and motor vehicle drivers, and the scores of motor vehicle drivers;

(5) Pointing out the illegal acts of motor vehicle drivers;

(six) to listen to the statements and arguments of motor vehicle drivers.