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LGV study notes

Vehicle Weights and Dimensions

Plated weights, axle loads, length and height limits, and bridge strikes.

What this topic covers

Plated weights, axle loads, length and height limits, and bridge strikes. The full LGV & HGV Theory Test & Toolkit app contains 64 questions on this topic.

In the app's syllabus: Vehicle size, Stowage and loading, Vehicle markings, Speed limiters.

Worked examples

Here are a few practice questions from this topic. Try answering each before reading the explanation.

Example 1

What does this road sign mean?

A. No goods vehicles under 7.5 tonnes maximum authorised mass
B. No goods vehicles over 7.5 tonnes maximum authorised mass ✓ correct
C. No goods vehicles over 7.5 metres overall height
D. No goods vehicles under 7.5 metres overall height

Explanation: It's essential that all limits are complied with to avoid breaking the law and facing possible prosecution. Weight restrictions normally apply to the plated weight of a vehicle, often referred to as the maximum authorised mass (MAM).

Example 2

What markings should be fitted to a lorry with a maximum authorised mass of more than 7,500 kg?

A.
B.
C. ✓ correct
D.

Explanation: Motor vehicles over 7,500 kg maximum authorised mass (MAM) and trailers over 3,500 kg MAM should have these markings fitted to the rear of the vehicle/trailer.

Example 3

When must you take extra care if you're driving a vehicle more than 3 metres (9 feet 10 inches) high?

A. When driving over narrow bridges
B. When driving up steep hills
C. When driving near airports
D. When driving under overhead cables ✓ correct

Explanation: You must take care when approaching any hazard where height is limited. Know the height of your vehicle and what you can drive under safely. If you’re not sure that it's safe, take another route.

Example 4

By how much can your stopping distance increase in icy weather?

A. 2 times
B. 4 times
C. 10 times ✓ correct
D. 20 times

Explanation: It's vital that you give yourself enough separation distance when driving on icy roads - 10 times as much as in normal conditions. You should brake gently to reduce the risk of losing control.

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More LGV study notes

Get all 64 questions on this topic in the LGV & HGV Theory Test & Toolkit app.