Only change lanes if doing so won't inconvenience another road user. Merging drivers have a responsibility to give way, if necessary, and not force their way onto the main carriageway. Planning ahead will ensure you're prepared to deal with these situations.

This sign is used to warn of overhead electrified cables and is usually accompanied by a plate indicating the safe height limit.

You should allow the faster-moving vehicle to overtake safely. If you pull out to overtake at this time, you'll cause the car behind to brake sharply. Don't use the size of your vehicle to intimidate. Be professional and show consideration to other road users.

Faulty power steering will make your steering wheel very difficult or almost impossible to turn. Continuing to drive could cause danger to you and other road users. You should park safely and get help.

If your vehicle catches fire in a tunnel, you should first try to drive it out - but only if you can do so safely.

Following the vehicle manufacturer's guidelines for service intervals will enable worn components to be replaced before they fail. This will help prevent costly breakdowns.

Potholes and raised drain covers in the road can unsteady a motorcyclist. They may suddenly swerve to avoid these uneven surfaces. Watch out at places where the road is in poor condition and this is likely to occur.

At the scene of an incident, you should tell your passengers what has happened, while reassuring them that they're not in danger. Explain to them that the emergency services are dealing with it and they should remain on the coach.

In the darkness, it will be difficult to assess the road ahead - especially if there are bends or hills, which may prevent you from seeing oncoming vehicles.

It's a legal requirement that you should make reasonable adjustments to provide for people with disabilities. You should make sure that any ramp or lift is in place and in good working order before leaving the depot.

Make certain that your filler caps are properly closed, so that you don't spill fuel as you drive along the road.

Many learners aren't confident when they first start to drive. Allow them plenty of room and don't react impatiently when they take their time. Remember that new drivers are inexperienced in dealing with traffic situations, so be patient.

The car is the most stable of the vehicles shown. However, all vehicles are affected by side wind and buffeting from larger vehicles. Be aware that your speed and road position could cause unnecessary turbulence when passing smaller vehicles.

Vehicles that carry dangerous goods have badges displayed on the side and rear. The badges are orange and show the type of material that's being carried. Make a note of this and report it to the emergency services when you contact them.

The sign shows the maximum authorised mass for goods vehicles. It's used to restrict heavy lorries (for example, in residential areas), but it doesn't apply to buses and coaches.

When approaching a tunnel, switch on your dipped headlights. Be aware that your eyes might need to adjust to the sudden darkness. You may need to reduce your speed.

By driving smoothly, you'll reduce fuel consumption by about 15%, and you'll reduce the amount of wear and tear on your vehicle. You'll also feel more relaxed and have a more pleasant journey.

You should also make allowances for any luggage your passengers may bring on board. An average of two cases per passenger on a 50-seat coach will add about 1.5 tonnes to the overall weight of your bus or coach.

Before overtaking assess the situation. Look well ahead to see if the cyclist will need to change direction. Be especially aware of the cyclist approaching parked vehicles as they will need to alter course. Do not pass too closely or cut in sharply.

If you can't produce your driving licence when asked to do so by a police officer, you may be asked to produce it at a police station within a certain time.

Because small wheels need to rotate faster, their tyres are more likely to overheat on long journeys at speed. Make sure you check them when you take rest stops.

Motorcyclists can often pass slow or stationary traffic because of the relatively small size of their vehicle. Take a last look in your right-hand mirror to check for motorcyclists and so avoid turning across their path.

This mirror offers the most benefit when you're manoeuvring in confined spaces. It shows you where your nearside front wheel is in relation to the kerb or a bay marking line.

Maximum authorised mass (MAM) means the maximum permissible weight of a vehicle, including it's load. It's also known as gross vehicle weight (GVW) or permissible maximum weight. You're responsible for making sure the MAM isn't exceeded when the vehicle is fully loaded.

Spilt diesel creates a serious risk to other road users, especially motorcyclists. Take care when refuelling and make sure that all filler caps and tank hatches are properly closed and secure.

While moving, hazard warning lights may only be used on a motorway or unrestricted dual carriageway to warn drivers behind of a need to slow down, due to a hazard ahead.

The effects of shock may not be immediately obvious. Try to recognise the warning signs early; prompt treatment can help to deal with it. Symptoms include a rapid pulse, pale grey skin, sweating and rapid shallow breathing.

It's essential that you're constantly aware of other road users and pedestrians around you. A routine of effective mirror checking should be established. You must also know when it's essential to make checks in the blind spots; for example, just below the nearside front of the vehicle, where a pedestrian or a cyclist could be out of sight when you move off.

Remember that the buffeting caused by large vehicles can affect other road users, including

• cars towing caravans
• motorcyclists.