Why is it that in the US you mostly see conventional 18 wheelers, while in Europe you have COE (Cab over engine). I've read that it's likely due to regulations regarding maximum length. In the US one only looks at the length of the trailer as opposed to Europe where the length of the entire vehicle is considered. In Europe this obviously means that a shorter truck equals more freight capacity. Fair enough, but still I don't get why conventional trucks dominate the US. Why would you want a truck that's longer that it needs to be? For one thing a COE-truck would give you more manouverbility.