You must inform the Driver and Vehicle Licensing Agency (DVLA), or the Driver and Vehicle Agency (DVA) in Northern Ireland, about any health condition likely to affect your driving. They'll investigate your condition and how it affects your ability to drive; they may not take away your licence.

Wet roads will reduce your tyres' grip on the road. The safe separation gap of at least two seconds in dry conditions should be doubled in wet weather.

When moving off from the side of the road, you shouldn't drive out into the path of an approaching vehicle, either behind or ahead. To make sure there's no vehicle in the blind area, drivers need to look around just before moving off.

You should normally overtake on the right, but there are some occasions when you may overtake on the left. These include when you're driving on a dual carriageway or motorway and the traffic is moving slowly in queues, or when a vehicle ahead is positioned to turn right and there's room to pass on the left. On dual carriageways or motorways, don't overtake on the left if traffic is flowing freely.

This is important because, when a learner encounters something on the road for the first time, they may not be able to decide whether it represents a risk. So they might not take the right action. With experience, they'll use the information available and get better at assessing risk.

You must use headlights at night, except on a road that's lit by street lighting. These roads are generally restricted to a 30 mph (48 km/h) speed limit. However, it's advisable to use headlights at all times when driving at night or in poor visibility, to help other road users to see you.

Some people find learning to drive easy, while others struggle with the challenge. It's important that lessons are matched to the pupil's ability. Mismatching lessons and ability can lead to loss of confidence, disinterest and dissatisfaction.

When parking on a hill, there's a risk of the car rolling if the parking brake fails. To reduce this risk, turn the front wheels towards the kerb. This will allow the kerb to act as a chock, preventing any forward movement of the vehicle.

The lights that control the crossing show to both directions of traffic. If a pedestrian from either side is still crossing when the amber light is flashing, you must wait.

Advise a pupil that they should never overtake on the approach to a junction. The driver they're following may decide to turn right at the last moment. Other vehicles may arrive quickly at the junction and turn left into your road without taking effective observation.

A successful candidate with vision in only one eye will be given an unrestricted pass certificate. As with all drivers, the licensing authority (DVLA) must be notified of any medical conditions when applying for a licence, and when those conditions develop or change.

Most pedestrian crossings are for pedestrians only, but the toucan crossing has been designed to be shared by both pedestrians and cyclists. You can expect to find a toucan crossing where a cycle route and a footpath cross a road at the same point.

Pedestrians walking on a road with no pavement are advised to walk facing oncoming traffic. With this knowledge, you can anticipate their presence and so give yourself time to react, if necessary, as you negotiate the bend.

The slip road should be used to allow you to accelerate until your speed matches that of the traffic already on the motorway. By doing this, you can join the motorway without affecting the progress of the traffic. At busy times, you may have to slow down to merge into slow-moving traffic. Always give way to traffic already on the motorway.

If your vehicle breaks down, use hazard warning lights as well as a warning triangle or other device to warn other drivers. It's even more important to do this in the dark. Warning triangles should be placed at least 45 metres (147 feet) from your vehicle and on the same side of the road. Don't use a warning triangle on a motorway.

Large, long and heavy vehicles will need more time to pass you than a car, especially uphill. If necessary, be prepared to slow down to let them pass.

Where there are extra hazards such as roadworks, it's often necessary to slow traffic down by imposing a temporary speed limit. The speed-limit sign will be circular and edged with a red ring. This tells you that the sign is an order and you must obey it.

The purpose of this road marking is to keep the junction clear of queuing traffic. You may only wait in the marked area when you're turning right and your exit lane is clear but you can't complete the turn because of oncoming traffic.

If you want to turn left and there's a cyclist in front of you, hold back. Wait until the cyclist has passed the junction and then turn left behind them.

You can overtake other traffic on either side when travelling in a one-way street. Make full use of your mirrors and ensure that it's clear all around before you attempt to overtake. Look for signs and road markings and use the most suitable lane for your destination.

If an ADI is charging for a driving lesson, they must display their ADI certificate and appropriate L or D plates on the tuition car.

If you have to leave valuables in your car, always lock them out of sight. If a thief can't see anything of value to steal, they're less likely to break in.

If you operate the brakes when air is in the hydraulic system, they'll have a spongy feel and braking efficiency will be reduced. This is because the air in the system is being compressed as you brake; hydraulic brake fluid alone can't be compressed. If you notice there's a fault with your brakes, have them checked as soon as possible. Don't drive with faulty brakes.

Before you set off, you should make sure that you can see clearly through all the windows. Don't just rely on the wipers to clear the front and rear, as this will leave dangerous blind spots. If you need to, pull up safely and clear the windows by hand.

You mustn't stop on the hard shoulder, except in an emergency. Never use it to have a rest or a picnic, to pick up hitchhikers, to answer a mobile phone or to check a road map. You mustn't drive back along the hard shoulder if you go past the exit you wanted.

Wait until you're sure that the vehicle is turning and not pulling up on the left, beyond your junction. Also consider that the driver may have left the signal on after completing a previous manoeuvre. Be especially careful if there's another road junction to your left.

Passengers over 14 years old are responsible for wearing a seat belt when travelling in a vehicle, unless they're exempt. A responsible driver will make sure that passengers have fastened their seat belts before setting off.

At a ford, the road passes through a stream at a place where the water is normally shallow. When you've gone through the water, you should test your brakes and if necessary dry them out. To do this, first check that you won't cause danger to traffic behind. Then apply a light brake pressure while moving slowly. Make sure your brakes are working properly before resuming normal driving.

It's not easy to see cyclists and motorcyclists, due to their small size when compared with other vehicles. At junctions, it's important that you look for these small vehicles; they're easy to overlook and riders are very vulnerable to injury in a collision.

On a single carriageway road, the national speed limit will apply, unless signs indicate otherwise. For a car, the limit is 60 mph unless the car is towing a trailer - in which case the limit is reduced to 50 mph.