> The United States is a vast, sprawling area with nearly every conceivable type of geography. The road conditions and residential density covers all possible ranges. The truck is designed for the worst case scenario allowable while minimizing drivers danger.

I'm pretty sure most of the geography in the US can be found in either Spain or Sweden as well. Except jungle I guess, but don't think you have much of that over there either. Besides the point anyway.

Yeah, the cars here do drive through a lot of different geographies as well. In the denser areas like cities, the postal workers are most often on motobikes or just walking though, depending on the density of the city.