ADI Vehicle Loading

Question 1

According to UK law, what is the maximum number of passengers a car may carry?

Accepted Answer

The number of seats fitted with seatbelts, as specified in the vehicle's registration document

Answer

A car may only carry the number of passengers for which seatbelts are provided. It is an offence to carry more passengers than there are seatbelts (for passengers aged 14+). The vehicle's V5C registration document specifies the number of passenger seats.

Question 2

How does overloading a vehicle affect its handling and safety?

Accepted Answer

Overloading increases braking distances, reduces steering responsiveness, increases the risk of tyre failure, and can make the vehicle unstable

Answer

Overloading a vehicle significantly affects safety: braking distances increase (more mass to stop), steering becomes less responsive, tyres may overheat and fail (exceeding their load rating), the suspension may bottom out, and the vehicle's centre of gravity rises, increasing the risk of rollover.

Question 3

When carrying a roof box or roof rack load, what effect does this have on the vehicle?

Accepted Answer

It raises the centre of gravity, increases wind resistance, affects fuel consumption, and may affect the vehicle's stability, particularly in crosswinds

Answer

Roof loads raise the vehicle's centre of gravity (increasing rollover risk), significantly increase wind resistance and fuel consumption, may cause instability in crosswinds, and can affect braking distances. Drivers should adjust their driving style accordingly and check the manufacturer's roof load limit.

Question 4

What is the legal requirement regarding the securing of loads on vehicles in the UK?

Accepted Answer

All loads must be securely fastened so that they do not move, shift, or fall from the vehicle, as required by the Road Vehicles (Construction and Use) Regulations 1986

Answer

Under the Road Vehicles (Construction and Use) Regulations 1986, all loads must be securely positioned and, if necessary, restrained so they cannot move, shift, or fall from the vehicle. The driver is responsible for ensuring the load is safe, regardless of its size or weight.

Question 5

A learner driver asks about towing a trailer. What weight restrictions should they be aware of?

Accepted Answer

The maximum trailer weight depends on the towing vehicle's gross train weight (GTW), and drivers who passed their test after January 1997 may need an additional licence category for heavier trailers

Answer

The towing vehicle's manufacturer specifies the maximum towing weight (found in the handbook or on the VIN plate). Drivers who passed their test after 1 January 1997 on a Category B licence may tow trailers up to 750kg, or heavier trailers if the combined MAM does not exceed 3,500kg. A B+E or C1+E licence may be needed for heavier combinations.

UK ADI Theory Practice Test

UK ADI Theory Practice Test

ADI Vehicle Loading