aspheric_cow t1_j6jndhd wrote
Europe has a limit on the total length of the truck+trailer. So a shorter cab allows for a longer trailer. The US has a limit on the length of the trailer, but not the cab, so the cab can be as long as you want. And a longer cab allows for better aerodynamics and more room inside, which is especially important for American long-haul trucks because most drivers live in the cab.
Tuga_Lissabon t1_j6jrth5 wrote
Just to add: this is not just the EU making rules for rule's sake
Remember europe is TONS older than the US. Plenty of twisty old roads and villages, far less straight, some really constrained routes.
Excessive length means trucks simply couldn't access some areas.
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