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Rules of the Road

RSA handbook · 292 pages · 271 embedded images

Vehicle safety

Page 41

at least 1 red warning triangle (this is required for HGVs and buses), a torch, and a small fire extinguisher.

The items listed above might be useful in an emergency. You might choose to carry other items that you feel might be helpful.

Motor vehicles must be tested for their roadworthiness. This section sets out the minimum standards that your vehicle must meet. You should check the following on a regular basis:

Tyres

Tread depth: Do not allow your tyres to wear down too much. Most vehicles must have a minimum tread depth of 1.6 mm over the main tread, however it is strongly recommended that you consider changing the tyres when they have reached 3 mm.

Pressure: Regularly check the pressure of every tyre, including the spare tyre, and pay attention to the recommended pressure levels. See the manufacturer’s specifications for correct inflation pressure.

Checking for damage: Regularly examine your tyres for cuts, cracks and bulges, which could cause unexpected ‘blow-outs.’

Before you get a flat tyre: Check your vehicle and make sure you know how to change a wheel, that you have a spare wheel and repair kit to hand.

Replacing tyres: For your safety, only fit new and e-marked tyres bought from a reputable dealer. Do not mix radial and cross ply tyres on any one axle. Tyres must be the same on any axle.

Temporary use (space saver) spare tyre or repair kit: Only use these tyres to complete a journey or make a journey to a tyre dealer. Do not travel at a speed in excess of the recommended speed stamped on the tyre.

Related practice questions

Topic links are not confirmation that this edition verifies each answer.

Extracted from the RSA Rules of the Road, Revision 9, May 2026. Source PDF · reuse permission unconfirmed.