目前日本的线路状态，因采取一系列强化轨道结构的措施，较之国铁时代和民营化初期，维修工作量已经少多了。然而仍有一些薄弱部位，如钢轨接头、桥梁前后的养护工作不尽如人意。无论是标准长度的钢轨接头还是长钢轨的焊缝处，由于构造上的原因使轮载冲击力比一般部位增大... At present, the state of the Japanese routes has taken a series of measures to strengthen the orbital structure. Compared to the era of the National Railways and the initial stage of privatization, the amount of maintenance work has been reduced. However, there are still some weak areas, such as rail joints, bridges, maintenance work before and after unsatisfactory. Whether it is the standard length of the rail joints or long rail weld, due to structural reasons to make the wheel impact than the general site to increase ...