After solving the car accident, if you don't call the police, the traffic police will deal with it. If an agreement is signed after the settlement, the parties can make compensation according to the contents of the agreement, regardless of the traffic police. However, if there is a situation that cannot be settled privately, the traffic police will take care of it without calling the police. According to Article 21 of the Procedures for Handling Road Traffic Accidents, if the parties reach an agreement through negotiation, they shall make and sign a self-negotiation agreement on road traffic accidents. The self-negotiation agreement on road traffic accidents shall specify the time, place, weather, name of the parties, driver's license number or ID number, contact information, motor vehicle type and license plate number, insurance company, insurance certificate number, accident form, collision location, responsibilities of the parties, etc.