rural-urban (urban-rural) continuum
Urban Railway
城市轨道交通
城市轨道
城市铁路
轨道交通
地铁
市区铁路
轻轨铁路
urban railway joint terminal
urban railway passenger car
Urban Railway Passenger Cars
Urban Railway Transportation
urban railway transportation vehicle
Urban Transit
城市交通
城市公交
城市轨道交通
轨道交通
城市交通运输
城市公共交通
Urban Transit Investment