交通部《汽车运输业车辆技术管理规定》对车辆的后期管理提出了“合理改造、适时更新”的原则。车辆改造的合理性和更新的适时性,应由车辆技术上的可靠性和经济上的合理性决定。对于车辆改造与更新与否,应视其技术状况、使用性能与运效的实际情况,经过分析和评价,预测出差额成 The Ministry of Communications, “Provisions on Technical Management of Vehicles in the Automobile Transport Industry” put forward the principle of “reasonable remodeling and timely updating” for the post-management of vehicles. The rationality of vehicle modification and the timely update should be determined by the technical reliability and economic rationality of the vehicle. For the vehicle transformation and update or not, it should be depending on the technical conditions, performance and operational effectiveness of the actual situation, after analysis and evaluation, to predict the difference into