Wet roads will increase the time it takes you to stop. Four seconds is the minimum gap you should leave on wet roads. This is double the gap you should normally keep from the vehicle in front on good, dry roads.

Driving slowly will give you better control of your vehicle. By using a high gear, you reduce the chance of your wheels spinning and skidding on the snow.

Standing on or near the edge of the carriageway is very dangerous. Your priority is to alert the emergency services by using an emergency roadside telephone. This connects to an operator, who'll get help out to you as soon as possible. In most cases, this is preferable to using a mobile phone, as it will show the operator your precise location.

In queuing traffic, motorcyclists may take the opportunity to filter between the lanes. Be aware that they may pass on either side and very close. Stay alert and always check your mirrors and blind spots before moving off, changing lanes or turning.

It's an offence to leave your vehicle unattended at any time without applying the parking brake.

Some highly dangerous chemicals have to be transported at prescribed temperatures. Drivers must be fully trained in the use of these specially designed, temperature-controlled vehicles.

Plan your journey and take breaks to keep in touch if necessary. When driving on motorways, you can't just stop to use your mobile phone. You'll need to turn off the motorway or wait until you reach the next service area. Avoid being distracted by switching your phone off while you're driving; use the message facility to listen to any calls when you've parked safely.

You must take 35 hours of training every five years to maintain your Driver CPC. This can be done at any time during the five years: all at once or split into sessions of at least seven hours each. The penalties for non-compliance are the same as those for driving without a licence.

Bulbs should be replaced as soon as you're aware that they've failed. Carry a stock of all the various bulbs used on your vehicle, so you can repair a fault without delay.

Vehicles being carried piggyback must always have chocks applied to their wheels, in addition to a restraint. Never rely on just their parking brake.

Moisture in the air condenses as the air pressure increases. This moisture can be transmitted around the braking system and is especially dangerous in cold weather. It can lead to ice forming and blocking the valves and pipes.

There will be an orange label on the side and rear of the tanker. Look at this carefully and report what it says when you phone the emergency services. Details of hazard warning plates are given in The Highway Code.

Leaking fuel can make the road extremely slippery. Look out for this, particularly on roundabouts.

When there's no traffic ahead of you, you should always drive in the left-hand lane.

If you have to drive through a flood, do so with caution. Once out of the flood, you need to test your brakes to make sure they're working properly. To do this, check what's behind you, then drive in a low gear with the brakes gently applied.

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.

The main causes of lorries shedding their loads are driver errors, such as sudden changes of speed or direction, driving too fast for the conditions, and harsh braking.

Many vehicles are very powerful and can maintain speed even when climbing a gradient. Even if your vehicle is capable of maintaining speed, you can still use the crawler lane to make it easier for other road users to overtake safely.

When using ropes, the ends should be spliced or otherwise treated to prevent fraying. The rope should be of at least three-strand construction, with a normal diameter of at least 10 mm.

High vehicles are often directed to the centre of the road to go under an arched bridge. Check that your vehicle doesn't exceed the height restriction indicated. Plan your route in advance to avoid any bridges that your vehicle won't be able to clear.

Causing excessive smoke is an offence and could contribute to causing an incident or collision. You could also end up creating serious traffic problems if your vehicle breaks down in a difficult location.

Never commit yourself to overtaking unless you're absolutely certain that you have the time and space to complete the manoeuvre safely. Don't take any risks that will endanger other road users.

Cycling in today's heavy traffic can be hazardous. Some cyclists might not feel happy about crossing the path of traffic to take up a position in an outside lane. Be aware of this and understand that, although they're in the left-hand lane, the cyclist might be turning right.

When discharging a load from a tipper vehicle, the centre of gravity is raised as the tipper body rises. To avoid the vehicle rolling over, it's vital that it's positioned on a level, solid surface before the tipper mechanism is engaged.

In congested tunnels, you should always obey the instructions given by variable message signs and tunnel officials. Listen out for radio announcements and observe the road signs and signals. Keep your distance from the vehicle in front.

At hump bridges, there's a risk of long vehicles grounding. If you aren't sure whether the floor of your vehicle will clear the bridge, find another route.

It's important to check all fluid levels during your daily checks, but it's especially important to remember the hydraulic fluid reservoir. A loss of fluid could lead to brake failure.

Watch out for pedestrians if you see a bus ahead. They may not be able to see you if they're crossing behind the bus.