州与州之间有两条车辆往来的次级公路，自然大都市地区除外，那里有三条。
The interstates have two lanes of traffic in each direction except in the metropolitan areas where they have three.
作为一个基本上是平原的国家，由高速公路，公路，次级路及乡村道路组成的网络覆盖。
Basically a flat plain, the country is crisscrossed by a intensive network of highways, roads, feeder roads and country roads.
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