"Semi-trailer truck"@en . . "In the US, tractor units tend to have the engine forward of the cab, while in Europe, most tractor units have the engine under the cab (the entire cab hinges forward for engine access), which allows for better maneuverability. Some tractor units have a small bedroom with a cot, so that the driver can sleep in the cab when on long journeys. Common trailer types are a metal box, a flat bed, a frame covered with tarpaulin, a tank for liquid, or a refrigerated, temperature-controlled unit. Very few are still in use, though some trailers are used for storage or as makeshift shelters. Refrigerated trailers are more useful for shelter, since even without the temperature control working, they are insulated."@en . "Colloquial terms for semi-trailer truck include truck and trailer, transfer truck, 18-wheeler, semi, Diesel, Mack truck (named for a prominent brand), big rig (US), transport (Canada), artic (UK and Ireland), and juggernaut (UK)."@en . . . . . . . . . . . . . . . . . . "Colloquial terms for semi-trailer truck include truck and trailer, transfer truck, 18-wheeler, semi, Diesel, Mack truck (named for a prominent brand), big rig (US), transport (Canada), artic (UK and Ireland), and juggernaut (UK)."@en . . . "In the US, tractor units tend to have the engine forward of the cab, while in Europe, most tractor units have the engine under the cab (the entire cab hinges forward for engine access), which allows for better maneuverability. Some tractor units have a small bedroom with a cot, so that the driver can sleep in the cab when on long journeys."@en . .