You should be familiar with all the warning lights fitted to your vehicle. The oil warning light indicates low oil pressure or lack of oil. If it lights up, report the fault and don't continue until it's been corrected.

When air is compressed, moisture condenses and collects in the air tanks. This can find its way along the network of pipes connected to the brakes. In frosty weather, the moisture can freeze in the pipes, blocking them completely. On modern vehicles, the air is dried before it's compressed and the air tanks drain automatically to shed any moisture. On older vehicles, the air tanks need draining manually.

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.

This sign tells you that the verge is soft. If you park here, there's a danger that your vehicle will become stuck. This can be inconvenient and could be costly if you need to be pulled out. In extreme cases, your vehicle may even tip over.

Block' gear changing means changing up or down to the most appropriate gear without going through each gear in turn. It reduces the number of gear changes, and this can improve fuel consumption.

A category D licence allows you to drive a coach or bus of any size. It also allows you to tow a trailer up to 750 kg. If you want to tow a trailer over 750 kg with a bus or coach, you'll need a category D+E licence.

Sometimes other road users disobey the rules or make errors of judgement. Try to accept this calmly and learn from their mistakes.

Always keep your speed down as you approach a zebra crossing. This will allow you to stop safely if necessary. Look well ahead for anyone about to reach the crossing or waiting to cross.

At a traffic incident, the danger of further collisions and fire needs to be dealt with first. Then you should deal with injuries in this order: airway, breathing, compressions and bleeding. Don't remove a motorcyclist's helmet unless it's essential to do so.

Some weight restrictions apply to heavy goods vehicles only and not to passenger-carrying vehicles. Look for a plate beneath a restriction sign that indicates this. Road signs show weight restrictions in various ways. You should make yourself familiar with all of them, so that you're in no doubt about their meaning and relevance.

It's essential to know the location of first-aid equipment, the fuel cut-off device and the fire extinguisher on every bus that you drive. Take time to familiarise yourself with their location whenever you drive a different vehicle. When you take your PCV test, you'll be asked questions on safety.

Take care if you're driving an empty high-sided vehicle when it's windy. Watch for places where the conditions could suddenly change, such as a gap between buildings or when passing under a bridge. Reduce your speed and stay alert for other road users who are also affected by these weather conditions.

If you're involved in an incident in a tunnel, be aware of the danger this can cause to other traffic. You should immediately switch on your hazard warning lights and switch off your engine.

The endurance brake (retarder) slows the vehicle without the use of the wheel-mounted brakes. However, care should be taken in slippery conditions, when the retarder's effect can be powerful enough to cause a skid.

Your head restraint should be adjusted so that, in the event of a collision, it protects your neck from whiplash injury.

The main reason why there are so many collisions at junctions is that drivers fail to see motorcyclists. A bright jacket or single headlight may help you identify an approaching motorcyclist, but you should be aware that not all motorcyclists wear bright clothing or use their headlights during the day.

To prevent your wheels from locking, you'll need to brake very gently on ice. Give yourself as much room and time as possible to stop. If your front wheels lock, you can't steer, and that will mean you can't avoid any obstacle in your path.

Check all medicines for their side-effects, such as drowsiness. If you're unsure, ask your doctor or pharmacist to explain how you might be affected by the medication.

Always look out for road signs, but be especially aware of those that refer to large or heavy vehicles. Get into the habit of checking for signs at junctions. There might be an indication on the junction layout sign. Before you turn, make sure that the road you're using doesn't have any restrictions for the vehicle you're driving.

If passengers have access to your coach, it must never be left unattended. In particular, they mustn't be able to get into the cab area of the vehicle. You or another responsible person must always be there to supervise the coach.

Air suspension provides a smoother journey than traditional suspension and transmits less vibration to the road surface, under-road services and nearby structures, such as bridges. It's considered to be environmentally friendly because it reduces damage to the road network.

If you're driving a high vehicle, make sure that there's enough headroom available for you to go through the tunnel. There may be additional signs showing height and width restrictions.

A person who's hysterical may do things that you wouldn't expect. Try to keep the distressed person calm and safe until the emergency services arrive.

As you pass pedestrians or vehicles on your left, you should use your nearside mirror and check that you've passed them safely. You need to allow a good safety margin before you move back to the left.

Blocking other vehicles' access to side roads is inconsiderate and can cause congestion. You should look at the flow of traffic and be aware of junctions when you're slowing down or stopping.

You may be driving in the rush hour, when traffic is heavy, so when you stop you're permitted to show your hazard warning lights. This will tell other road users that children are getting on and off the bus. Look out for passing traffic and make sure that all your passengers get on and off safely.

When an analogue tachograph is installed and calibrated, an installation plaque is fixed near the tachograph. This shows the date of the most recent tachograph calibration. Under EU rules, this must take place every six years.

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.

Be especially careful about moving casualties at the scene of an incident. Inexperienced handling of a casualty could cause more injury, or even prove to be fatal. Only move casualties if they're in danger; for example, from fire.

You have a legal responsibility to make sure that your vehicle is fully roadworthy. Daily walk-round checks give you the chance to look for any defects with your vehicle.