At three o'clock in the morning, there is a traffic policeman on duty who checks for drunk driving. According to different policies in different places, the shift breaks of the traffic police on duty are different. The time when the traffic police organize to go on the road to check for violations such as drunk driving without a license, as well as the time when the traffic police go on duty and check, because of the limited police force, it is generally determined according to the needs of local traffic management and the rules of these violations. Therefore, if the traffic management needs, After 12:00 a.m., there may still be traffic police on duty on the road to check, or organized investigation of drunk driving without a license and other violations. However, drunk driving and drunk driving are suspected of being illegal and criminal, which is not advisable at any time.
 Legal basis
 Article 91 of the Road Traffic Safety Law of the People's Republic of China, if a person drives a motor vehicle after drinking, his motor vehicle driving license shall be temporarily withheld for six months and he shall be fined not less than 1000 yuan but not more than 2000 yuan. Whoever is punished for driving a motor vehicle after drinking alcohol, and who drives a motor vehicle after drinking again, shall be detained for not more than 10 days, fined not less than 1000 yuan but not more than 2000 yuan, and his motor vehicle driving license shall be revoked. Whoever drives a motor vehicle while intoxicated shall be restrained by the traffic control department of the public security organ until he wakes up, his motor vehicle driving license shall be revoked, and criminal responsibility shall be investigated according to law; No motor vehicle driver's license may be obtained again within five years. Whoever drives a motor vehicle after drinking alcohol shall be detained for 15 days and fined 5000 yuan, his motor vehicle driving license shall be revoked, and he shall not obtain a new motor vehicle driving license within five years. If a person drives a motor vehicle while drunk, the traffic control department of the public security organ shall restrain him until he wakes up, revoke his motor vehicle driving license, and investigate his criminal responsibility according to law; It is not allowed to obtain a new motor vehicle driving license within ten years. After obtaining a new motor vehicle driving license, it is not allowed to drive a commercial motor vehicle. If a serious traffic accident occurs after drinking or driving a motor vehicle while intoxicated, which constitutes a crime, criminal responsibility shall be investigated according to law, and the traffic control department of the public security organ shall revoke the motor vehicle driver's license, and may not obtain a new motor vehicle driver's license for life.