Semi-trucks on American roads are often referred to with the "Tractor Trailer" moniker, which may be old-fashioned, but does ...

Semi-trucks didn't start out with diesel engines, but there are specific reasons why the majority of semi-trucks on the road today use diesel engines.

The spikes on semi-truck wheels are covers that protect lug nuts from road debris. They may also encourage drivers to give trucks extra room on the road.