In Europe, you almost never see trucks with bonnets up front. In USA, you almost never see trucks with flat fronts. I assume this is partly regulation (truck length limits in EU maybe??), but what is the major cause for this difference? And why has no American brands adopted the European style so that the trucks can be sold on both sides of the little lake we call the Atlantic Ocean? I've never seen a Peterbilt or a Kenworth in Europe. The only brand on both sides is Volvo, and even they make specific trucks for Europe and USA.
I guess it has something to do with axle loading. In the US the maximum axle loading is 7.7 tonnes, while in Europe it's up to 12 tonnes. So you end up with more axles, more spread wheels, longer vehicle length. You can sort of see the same with the heavy trailers.
On the other hand, due to the twistyness of european roads, short trucks are needed very badly.
There's some possibility that the Chicken War
might also have something to do with so...