A wagon that tows more than one wagon compartment is called"Road trains", this is because they resemble railway trains in appearance and mode of transportation.
Typically, this type of wagon consists of a single tractor (called a trailer or tractor) pulling multiple wagon compartments (called trailers or trailers), forming a long line of consignments. These trailers are usually joined together to form a structure that resembles a train. This structure makes the wagon train look like a series of railroad trains when it travels on the road.
These road trains are often used for long-distance freight transportation and can transport large quantities of goods at once. They are designed so that goods can be transported to their destination more efficiently, while reducing the workload between the driver and the vehicle. Road trains usually run on highways, are subject to road traffic regulations, and often have special sections or lanes for these large trucks.
In general,"Road trains"This term is used to describe wagons that tow multiple wagon cars to emphasize their resemblance to rail trains in terms of mode of transportation and appearance.