The tilt test is a type of safety test that certain government vehicle certification bodies require new vehicle designs to pass before being allowed on the road or rail track. The test is an assessment of the

weight distribution Weight distribution is the apportioning of weight within a vehicle, especially cars, airplanes, and trains. Typically, it is written in the form ''x''/''y'', where ''x'' is the percentage of weight in the front, and ''y'' is the percentage in the ...

and hence the position of the centre of gravity of the vehicle, and can be carried out in a laden or unladen state, i.e. with or without passengers or freight. The test can be applied to

automobile A car or automobile is a motor vehicle with wheels. Most definitions of ''cars'' say that they run primarily on roads, seat one to eight people, have four wheels, and mainly transport people instead of goods. The year 1886 is regarde ...

truck A truck or lorry is a motor vehicle designed to transport cargo, carry specialized payloads, or perform other utilitarian work. Trucks vary greatly in size, power, and configuration, but the vast majority feature body-on-frame constructi ...

bus A bus (contracted from omnibus, with variants multibus, motorbus, autobus, etc.) is a road vehicle that carries significantly more passengers than an average car or van. It is most commonly used in public transport, but is also in use for cha ...

es and rail vehicles. The test involves tilting the vehicle in the notional direction of the side of the vehicle, on a movable platform. In order to pass the test, the vehicle must not tip over before a specified angle of tilt is reached by the table. In the

United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the European mainland, continental mainland. It comprises England, Scotlan ...

double-decker bus A double-decker bus or double-deck bus is a bus that has two storeys or decks. They are used for mass transport in the United Kingdom, the United States, New Zealand, Europe, Asia and also in cities such as Sydney; the best-known example is the ...

es have to: "be capable of leaning, fully laden on top, at an angle of 28 deg without toppling over before they are allowed on the road." The same 28-degree requirement is in place in Hong Kong for double-decker buses. For single-deckers the requirement is 35 degrees.

References

{{tech-stub Product safety Vehicle design

See also

References