A buffer lane is used when the wind begins to cause a risk to high-sided vehicles. At other times, it will be a normal lane. Don't use the buffer lane unless your vehicle has been blown off course into the lane, or you need to use it to avoid an incident or collision.

Continuous use of the brakes on a long downhill gradient can cause them to overheat and become ineffective. This is called brake fade. You should use a low gear to enable the engine's braking effect to help control your speed. Also use the vehicle's retarder, if fitted. As well as reducing the likelihood of brake fade, this helps to keep air pressure in the tanks.

Projection marker boards must be fitted if the load on your vehicle overhangs by more than 2 metres (6 feet 6 inches). This will help other road users who may not notice the projecting load.

You're responsible for the safety of the load you're carrying. At no time should the load endanger other road users. It's vital that you make sure your load is secure and safely distributed on your vehicle. How you do this will depend on the

• bulk
• weight
• type of vehicle you're driving (flat bed, curtain side, etc)
• nature of the load.

It's illegal to drive a vehicle that's emitting excessive exhaust smoke, so you should get the problem fixed as soon as you're aware of it. Excessive exhaust smoke increases pollution and creates a hazard for other road users.

This traffic sign means no stopping on the main carriageway at any time, not even to set down passengers. However, you may stop in a lay-by.

There's a particular risk when driving between 2 am and 7 am. This is when the 'body clock' is programmed for sleep in most people. There's another, smaller, dip between 2 pm and 4 pm. If you feel that tiredness is affecting your ability to drive, stop in a safe place and rest.

It's a legal requirement that your tyres have at least the minimum permitted depth of tread and are in good condition before you start any journey. Make sure that you inspect them before setting off, and at regular intervals.

When approaching a long hill, you should take note of any early warning signs. Reduce your speed and select the appropriate gear in good time. Using an endurance brake (retarder), if fitted, will help control your speed.

Make sure you have enough rest before you start a night shift. Driving at night can be tiring and you must be able to stay alert for the whole of your shift. Making sure that there's enough fresh air in the cab can help you to stay alert. Stale, warm air can dull your senses and cause drowsiness.

In icy or snowy weather, your stopping distance can increase by up to ten times. Because snowy weather increases the distance needed to stop, you must look further ahead and leave an increased safety margin.

Always plan well ahead before overtaking. Take into consideration the size of your vehicle and whether there's a gradient ahead. The load on your vehicle will slow you down on an uphill gradient. It may be better to wait until you're on the level before trying to overtake.

You may use the right-hand lane to overtake on a two-lane motorway. Lorries weighing more than 7.5 tonnes, vehicles that are required to be fitted with speed limiters, and vehicles towing trailers aren't allowed to use the right-hand lane of a motorway with three or more lanes, except in special circumstances.

If you overfill the engine with oil, you could cause the engine to build up too much pressure when it's running. This could cause damage to oil seals and gaskets.

At night, a pedestrian carrying a red light should be at the back of an organised walk. The walkers should keep to the left, but this won't always be the case. Pass them very slowly. Be aware that the pedestrians may have their backs to you and might not know you're approaching.

Lanes at roadworks often have weight restrictions to keep larger vehicles in the left-hand lane. The lanes through the roadworks are often narrow and therefore not wide enough for large vehicles to pass each other safely. Always look for restriction signs at roadworks. They're usually placed well in advance to give you time to move safely into the correct lane in good time.

It's important to stow away all your electrical cables and air lines safely to avoid causing injury to others. Connectors left lying around can be a trip hazard and can be damaged if they're run over by another vehicle.

If your vehicle is too long to fit into a passing place, you may need to wait opposite one. This will allow a following or approaching driver to pass. When you use this type of road, you need to plan and look well ahead to avoid meeting another road user at an inappropriate place.

If your current tachograph chart becomes damaged, you should start another and then attach it to the damaged one. Your records must be clear and up to date at all times. It's sensible to carry more tachograph charts than you think you'll need for your journey. Then you'll be able to use a spare if one becomes dirty or damaged.

Puffin crossings have sensors that detect when pedestrians are using the crossing. The sensors control the timing of the traffic lights, and this means that there's no flashing amber phase as there is with a pelican crossing.

On smart motorways, the hard shoulder can be used as a running lane when a speed limit is shown above it. However, a red cross above the hard shoulder means that this lane shouldn't be used, except for emergencies and breakdowns.

The lighter the vehicle, the more likely it is to be affected by the buffeting from your vehicle in windy weather. Give motorcyclists and cyclists extra room when you overtake them, as your vehicle's draught can easily upset their control and balance.

Unless the curtains are specifically designed, they must not be used to restrain the load. They should be used to protect it from the weather and provide a level of security. Most companies also use them as a mobile advertisement.

Continually using the brakes could cause them to overheat. When that happens, they become less effective. This is called brake fade, and it occurs most often when the driver has to control the vehicle's speed on a long downhill gradient. To help prevent brake fade, use the endurance brake (retarder) and a lower gear to keep the vehicle's speed in check, rather than the wheel-mounted brakes.

Horse riders often keep to the outside of the roundabout even if they're turning right. Give them room in case they have to cross lanes of traffic.

As well as your driving licence, you'll need to carry the insurance certificate and vehicle registration document. Other documentation may also be needed for some countries. Check this before starting your journey.

Short-wheelbase vehicles will bounce more noticeably than some long-wheelbase vehicles when empty. This can affect braking efficiency and all-round control.

Scan the road as you drive. Try to anticipate hazards by being aware of the places where they're likely to occur; for example, pedestrians and cyclists emerging between parked cars on a busy street. If you're prepared, you'll be able to slow down or stop in good time.