Desmond Ng
Well, heres my two cents. I have lived in both Singapore and America,and have observed both country's infrastructure. I think its because of America's sheer size and population centres.
You see, America is the world's 3rd largest country, coming in behind Canada and Russia.and narrowly beating out China. But theres one key difference. 99% of Canada's population is concentrated within 150 kilometres of the Canadian-American border. 70% of Russia's population is in its European land, comprising 30% of its territory. 80% of China's people are concentrated in the East coast.

好吧,这是我的一点看法。我曾在新加坡和美国生活过,并观察过两国的基础设施。我认为这是因为美国的规模和人口中心所致。
你看,美国是世界第三大国,仅次于加拿大和俄罗斯,比中国略大一点。但有一个关键区别。加拿大99%的人口集中在距离美加边界150公里内的地区。俄罗斯70%的人口位于其欧洲部分,占据了其30%的领土。中国80%的人口集中在东海岸地区。