“中途上车”是指在车票有效期内,铁路旅客持所购车票在按车票规定日期发车的该次列车所经的中途站上车的行为。其实质就是旅客在铁路客运合同生效后,以自己的意思单方变更合同内容,对承运人债务进行部分免除的行为。旅客享有“中途上车”的权利,其座位(铺位)应该由铁路承运人予以保留。当前我国铁路旅客运输应当建立相应的旅客“中途上车”通知制度。 “On the train ” refers to the train ticket during the validity period, the railway passengers holding tickets purchased in accordance with the provisions of the date of the train departure of the train through the stopover behavior. The essence of this is that the passenger, after the entry into effect of the railway passenger contract, unilaterally changed the contents of the contract by his own means and partially canceled the carrier’s debt. Passengers have the right to “embark on the train”, their seats (shops) should be retained by the railway carrier. At present, China’s railway passenger transport should establish a corresponding passenger “on the train ” notification system.