1, traffic accident monitoring and preservation is generally not less than 30 days. Public security organs have the right to use traffic technology monitoring equipment to collect evidence of illegal acts. When using monitoring equipment to record data, the content of the record shall be reviewed within five days before it can be used as evidence to punish illegal acts.

2. Legal basis: Article 114th of the Road Traffic Safety Law of the People's Republic of China.

The traffic administrative department of the public security organ may, according to the traffic technical monitoring records, punish the illegal motor vehicle owners or managers according to law. If the driver can be determined, he may be punished in accordance with the provisions of this law.

"Road traffic accident handling procedures" nineteenth

Within five days after the traffic technical monitoring equipment collects the records of illegal acts, the traffic administrative department of the public security organ where the illegal acts occur shall review the records and input them into the road traffic violation information management system as evidence for punishing the illegal acts.

Article 21

If the illegal information recorded by traffic technology monitoring equipment can determine the actual driver after verification, the traffic management department of the public security organ can record it as the illegal information of the actual driver in the road traffic illegal information management system.

Second, how to retrieve traffic accident monitoring video

Traffic accident monitoring video can be directly applied to the monitoring video management unit for retrieval. If the surveillance video management unit does not agree, it can apply to the court for retrieval through litigation. The people's court has the right to investigate and collect evidence from the relevant units and individuals, and the relevant units and individuals may not refuse. The people's court shall distinguish the authenticity of the documents submitted by the relevant units and individuals, and examine and determine their validity.