A tank truck, gas truck, fuel truck, or tanker truck or tanker is a motor vehicle designed to carry liquids or gases on roads. The largest such vehicles are similar to railroad tank cars, which are also designed to carry liquid loads. Many variants exist due to the wide variety of liquids that can be transported. Tank trucks tend to be large; they may be insulated or non-insulated; pressurized or non-pressurized; and designed for single or multiple loads. Some are semi-trailer trucks. They are difficult to drive and highly susceptible to rollover due to their high center of gravity, and potentially the free surface effect of liquids sloshing in a partially filled tank.
A Shell Jet A refuel tank truck on the ramp at Vancouver International Airport
Tank truck from 1926
Ampol Tank Truck in 1951 on Botany Road, Mascot, New South Wales. Photograph taken by Sam Hood for LJ Hooker, State Library of New South Wales, 14089
1960 Peterbilt 281 tanker truck from Steven Spielberg's 1971 film Duel
A tank car or tanker is a type of railroad car or rolling stock designed to transport liquid and gaseous commodities.
Rows of tank cars at a railyard in the Midwestern United States
Inside the valve housing on top of a tank railcar in the United States
A historical milk tank car for bulk loading at the Illinois Railway Museum.
Type of shipping containers mounted on a spine car: Tank container (left), and an open-top shipping container with canvas cover (right)