caboverengine

Caboverengine, more commonly written as cab-over-engine or COE, refers to a vehicle design in which the cab is mounted above or very close to the engine, producing a flat-fronted, short-nosed appearance. In COE trucks the engine sits beneath the cab floor or directly in front of the firewall, and many models feature a tilting cab for access to mechanical components.

The COE layout originated early in motor vehicle development and gained particular popularity in Europe and parts of Asia after World War II. Its key benefits include a shorter overall length for a given wheelbase, more usable cargo area, and a tight turning radius, all of which suit urban delivery and regional hauling. The cockpit typically offers strong forward visibility, an advantage in congested environments, and easier cab ingress and egress in some configurations.

Disadvantages of cab-over designs include a higher cabin position that can raise concerns about safety in frontal crashes and pedestrian collisions. The absence of a long engine hood can complicate certain maintenance tasks, and some layouts expose components more directly to heat, noise, or debris. In addition, crash shock management and occupant protection have historically been more challenging in COE configurations, prompting ongoing safety improvements in modern variants.

Usage varies by region and vehicle type. COE remains common for light- and medium-duty trucks in many European and Asian markets, where space efficiency is valued. In North America, conventional (long-nose) cabs became dominant in the late 20th century due to safety and regulatory considerations, though COE designs persist in certain markets and for specific applications, such as some municipal buses and specialized vehicles. Modern COE trucks reflect advances in cab safety, energy-absorbing structures, and improved crash compatibility.