In 1887 Congress designated rail a common-carrier service. Railways had to offer reasonable rates and conditions on any cargo.
在1887年，国会设计了公共运输服务的线路，铁道部门必须对任何货物提供合理定价。
2
"Carrier" means any person who, in a contract of carriage, undertakes to perform or to procure the performance of transport, by rail, road, air, sea, inland waterway or by a combination of such modes.
The AFC system of Dalian rapid rail transit line 3 is the first of its kind independently developed by China itself, which employs contactless IC card as the carrier of tickets.