南京和武汉均为我国特大城市和交通枢纽,沿江两岸经济发达。根据远景规划,两座城市都将成为国际性大都市,市内交通(包括公铁和地铁)及跨地区的铁路在这里都面临过江的问题。两城市在跨越长江的交通现状上,有一点非常相似,即市内已有或即将有两座跨越长江的桥梁,其中,武汉长江大桥 Nanjing and Wuhan are both megacities and transport hubs in our country, with economically developed areas on both sides of the Yangtze River. According to the long-term planning, both cities will become international metropolises. The transportation in the city (including the railways and the subway) and the trans-regional railroads all face the problem of crossing the river here. The two cities are quite similar in traffic status across the Yangtze River, namely, there are two bridges across the Yangtze River in the city. Among them, the Wuhan Yangtze River Bridge