Slow-moving vehicles, such as a salt spreader or breakdown vehicle, may use a flashing amber beacon. On unrestricted dual carriageways, vehicles with a maximum speed of 25 mph (40 km/h) or less must use a flashing amber beacon.

While the car is in motion, hazard warning lights are only allowed to be used if you're travelling on a motorway or unrestricted dual carriageway and you want to warn traffic behind of a hazard ahead. Only use them for a short period of time - just long enough to ensure that your warning has been seen.

At a pelican crossing, there's a phase where the amber light flashes. This will show after the red light and gives pedestrians time to finish crossing safely. For drivers, the flashing amber light means they may drive on if the crossing is completely clear, but they must wait if pedestrians are still on the crossing.

If you see a vehicle with a flashing green light, allow it to pass when you can do so safely; it will be a doctor on an emergency call. Someone's life could depend on the driver making good progress through the traffic.

Yellow lines are painted across the road on the approach to some roundabouts. The lines are usually found on dual carriageways, where traffic speeds are higher, or at the end of motorway exit slip roads. They provide a visual warning to remind drivers to check their speed.

If your front wheels are out of balance, the steering will vibrate. You'll have to take your vehicle to a garage or tyre-fitting firm, where they can balance your wheels; it isn't a fault that will rectify itself.

When you've driven through a ford or flood, your brakes may be soaking wet. Water can reduce your brakes' efficiency, so check that they're working properly before you build up speed again. Lightly applying the brakes while driving slowly will help them to dry. Before you do this, remember to check your mirrors and consider what's behind you.

In very wet weather, water can build up between the tyre and the road surface. As a result, your vehicle rides on a thin film of water and your tyres won't grip the road. Gravel or shingle surfaces also offer less grip and can cause problems when braking. An anti-lock braking system may be ineffective in these conditions.

If the amber warning lights come on as you're approaching the crossing, you must stop unless it's unsafe to do so. Red flashing lights together with an audible signal mean you must stop. If the warning lights and alarm start as you're driving over the crossing, continue and clear the crossing; it would be dangerous to stop at that point.

At a pelican crossing, the green light means you may proceed as long as the crossing is clear. If someone hasn't finished crossing, be patient and wait for them.

When travelling down a steep hill, your vehicle will tend to increase speed. This will make it more difficult for you to stop. To maintain control and prevent the vehicle from running away
- select a lower gear - the engine will then help to control your speed
- use the footbrake to maintain control.

Normally, a driver shouldn't stop or park on a road that has double white lines along the centre. However, you may stop for long enough to set down or pick up passengers, or to load or unload goods.

Coloured studs are used to help you judge your position on the carriageway in poor visibility. Knowing which colour is used and where can help keep you safe. Amber studs are used between the right-hand lane and the central reservation on a motorway or dual carriageway.

You should always assess the depth of the water and avoid driving through deep or fast-flowing water. There's a risk that water may stop the engine if it enters the combustion chamber via the air intake, obstructs the exhaust pipe or short-circuits the ignition system. In addition, there's a risk of the vehicle being swept away by fast-flowing water. To drive through shallow water, you should drive slowly, because this will prevent a wave from washing over the engine. To ensure the exhaust pipe doesn't become flooded, the engine speed should be kept high, which may require you to slip the clutch.

Some bus lanes only operate during peak hours and other vehicles may use them outside these hours. Make sure you check the sign for the hours of operation before driving in a bus lane. Where no hours are shown, the bus lane operates 24 hours a day.

A mirror with convex glass has a wide field of vision but makes it more difficult to judge the distance and speed of traffic behind. Vehicles seen in this type of mirror appear to be further away than they actually are.

A red cross with flashing red lights above your lane shows that your lane is closed. You should move into another lane as soon as you can do so safely. If the signal shows above all lanes, you must stop and not go beyond the signal.

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.

Look at each sign that you pass on the road, so that you don't miss any warnings, orders or information. The shape of the sign will tell you its purpose: triangular signs warn, circles give orders and rectangles inform.

Pedestrians and cyclists can both cross at a toucan crossing; cyclists are permitted to ride across.