The cab over engine or cab forward has a flat nose cab with the driver sitting in front of the front axle. Widely used in the EU and Japan, this style has the advantages of good vision and maneuverability and shorter cab length, at the expense of driver safety in case of an accident. Had a flat nose cab located higher over the engine, with the driver sitting above the front axle. This allowed a sleeper compartment in a short tractor, and maximum wheelbase relative overall length, important for bridge formula weight restrictions.cab over engine truck as well as conventionals are in common use.