These tiers could categorize methods of operation in conjunction with safety improvements such as separationof passenger and freight traffic and advanced train control systems.
这些安全措施包括将客运流量与货运流量隔离，升级列车控制系统等。
2
Passenger vehicle one-way control, separationof the entrance and exit, benefit for reducing the pressure on the surrounding traffic.
客运车辆单向控制，出入口分离，有助降低周边交通压力。
3
In the separationof people and vehicles on the basis of the ground floor of the walk traffic becomes safe, smooth and simple.