urban traffic safety level
large-scale urban traffic engineering project
rights of taking part in urban traffic
rural-urban (urban-rural) continuum
the countermeasures and proposal of protecting urban safety
The problem of urban traffic
three-dimensional urban traffic
underground urban traffic tunnel
urban safety management
Urban Traffic Congestion
urban traffic control and management system
Urban traffic control and route guidance
Urban Traffic Control System
城市交通控制系统
交通控制系统
交通信号控制系统
城市交通管制系统
市区交通控制系统
urban traffic control system UTCS
Urban Traffic Coordinated Signal Control System