Tractor unit
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A tractor unit is a characteristically heavy-duty tow vehicle that provides motive power for hauling a towed or trailered load. The largest such vehicles are similar to locomotives. These fall into tw
Peterbilt 386 sleeper-cab–style commercial 6×4 tractor unit
A Leyland T45 cab-over 4×2 tractor unit
An Oshkosh M1070 8×8 Heavy Equipment Transporter (HET) tractor pulling a 5-bogie M1000 HETS trailer, carrying a slat-armored M93 Fox 6×6 NBC detection vehicle near Baghdad
Semi-trailer truck
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A semi-trailer truck is the combination of a tractor unit and one or more semi-trailers to carry freight. A semi-trailer attaches to the tractor with a type of hitch called a fifth wheel. Semi-trailer
Tractor unit
…heavy-duty typically off-road-capable, often 6×6, military and commercial tractor units, including ballast tractors. It should not be confused with a tractor-trailer which is a combination of a tractor unit and semi-trailer, whereas a tractor unit describes only the tractor portion. Tractor units typically have…
Peterbilt conventional style cab
Mercedes-Benz cab-over semi-tractor
International with an end-dump trailer
A FAW in China