Hello, when your father was serving his sentence, you drove his vehicle to have a traffic accident. This problem needs to be analyzed from several aspects: first, the mere occurrence of a traffic accident itself will not directly lead to your father being sentenced to an additional sentence. Because the actual driver is you, and the subject of responsibility is also you, unless it can be proved that your father has abetted or instigated behaviors. Secondly, with regard to vehicle insurance, only in the case of compulsory traffic insurance, the part of compensation exceeding the limit of compulsory traffic insurance should be borne by the driver (that is, you). If the vehicle is registered in your father's name, in theory, as the owner of the vehicle, he may have to bear joint and several liability, but this belongs to the scope of civil compensation liability, and will not affect his sentence. It is recommended that you: 1. Properly handle accident compensation to avoid new disputes 2. If the amount of compensation is large, consider negotiating with the other party to pay compensation by installments 3. In the future, it is better to buy full commercial insurance when driving. Your father's current sentence depends mainly on the execution of his original sentence. If there are no other special circumstances in this traffic accident, his sentence will not be affected generally. If there are specific details to be consulted, further communication can be made.