fourth rail meaning in Chinese

第四接触轨

The fourth rail line between guangzhoushi and shenzhen is now planning for construction
一俟筹集到所需资金，便会展开建筑工程。
Comprising tai wai to diamond hill link , east kowloon line and fourth rail harbour crossing
包括大围至钻石山线、东九龙线、第四条过海铁路线。
Essential strategic transport infrastructure , including central - wan chai bypass , island eastern corridor link , road p2 , north hong kong island line , and connection for the fourth rail harbour crossing section of the shatin to central link
建造必需的策略性运输基础设施，包括中环湾仔绕道、东区走廊连接路、 p2路、北港岛线，以及沙田至中环铁路线过海线段(第四条过海铁路)的接驳道路