underground urban traffic tunnel
Urban Traffic Link Tunnel
large-scale urban traffic engineering project
large-spanned urban tunnel
rights of taking part in urban traffic
The problem of urban traffic
Urban Traffic Congestion
Urban traffic control and route guidance
Urban Traffic Control System
城市交通控制系统
城市交通管制系统
市区交通控制系统
交通控制系统
交通信号控制系统
Urban Traffic Coordinated Signal Control System
urban traffic environment
Urban Traffic Mode Structure