The weighbridge is a weight measuring instrument formed by a metal or concrete platform[1]​ that rests on load cells connected to each other and from them to a sum box, from where the electrical signal is sent to a weight indicator terminal.

Typically used to weigh trucks,[2]​ it can also be used to weigh railroad cars, dumpers, tractors, and also aircraft.

The most advanced equipment incorporates access barriers, traffic lights and positioning elements, card readers and license plate and driver identification via video cameras.

They are verified and sealed by a center or service legally approved for this purpose. In Spain, this service is provided by public companies dependent on the government of the autonomous communities. There are also some private entities that work under a public concession regime.

Car transport scales have several of the most important technical characteristics, and these are parameters such as:.