Under normal circumstances, the driver of the vehicle behind the collision shall bear the primary responsibility for the accident, and the driver of the vehicle parked illegally shall bear the secondary responsibility
 There are two types of illegal parking: one is illegal temporary parking specified in the safety law, which affects normal traffic, including parking without pulling over, and the driver leaving the vehicle; A kind of illegal parking of faulty vehicles, such as no signs, illegal parking on bridges, etc. If an accident occurs, the responsibility for the accident is determined according to the degree of fault. In most cases, it is determined as secondary responsibility.
 Legal basis
 Article 60 of the Provisions on Road Traffic Accident Handling Procedures The traffic management department of the public security organ shall determine the responsibility of the party according to the role of the party's behavior in the road traffic accident and the severity of the fault.
 （1） If a road traffic accident is caused by the fault of one party, it shall bear full responsibility;
 （2） If a road traffic accident occurs due to the fault of two or more parties, they shall bear the primary responsibility, equal responsibility and secondary responsibility respectively according to the effect of their actions on the accident and the severity of the fault;
 （3） Each party has no fault that causes road traffic accidents. If it is a traffic accident, neither party is responsible.
 If one party intentionally causes a road traffic accident, the other party shall not be liable.