Before leaving your vehicle parked, you must stop the engine. The parking brake must be set and the vehicle should be safe and secure when you leave the cab.

This is the sign for a tram. These vehicles are powered by electricity and reduce the emissions released into the environment. As they can carry many people, they can help to reduce the number of other vehicles on the road.

In an emergency, time can be of the essence. The emergency services need to know your exact location. Before you phone, get the post number from the nearest marker post on the edge of the hard shoulder. Give this to the emergency services, as it will help them to locate you.

SRVIs are more evident in young male drivers, who tend to ignore or deny how they're feeling. The greatest risk is between the hours of 2.00 am and 7.00 am, when the body clock is in a trough. Make sure you take sufficient rest breaks and don't ignore feeling sleepy.

You must always be aware of the size of your vehicle. Look out for road signs that show a width restriction. There should be an indication of this at the entrance to the road. Don't get into a situation where you have to reverse out of a narrow road because you haven't seen a sign.

If you can't produce your driving licence when asked to do so by a police officer, you may be asked to produce it at a police station within a certain time.

Look out for signs above your lane or on the central reservation. These will give you importantn information or warnings about the road ahead. To allow for the high speed of motorway traffic, these signs may light up some distance from any hazard. Don't ignore the signs just because the road looks clear to you.

Even though a warning device indicates low air-brake pressure, you may still be able to release the parking brake. If you do this and start moving, the service brake may be ineffective and you may not be able to stop.

To help a casualty who isn't breathing, you should remove any obstructions from their mouth and tilt their head back slightly. These actions will help to keep their airway clear and maintain the correct position if mouth-to-mouth resuscitation is required.

If you feel the onset of tiredness, you need to take a break. This might be at a motorway service station, but if there isn't one nearby you'll need to leave at the next exit and find a safe place to stop and rest.

There are times when other road users make incorrect or ill-judged decisions. Try to stay calm and don't retaliate or react aggressively, especially as your vehicle is likely to be larger and more intimidating than the other person's. Always put safety first.

Don't hurry elderly people across the road by getting too close to them or revving the engine. Be aware that they might take longer to cross. They might also have hearing difficulties and not hear you approaching.

The 'stop' sign is the only road sign that's octagonal. This is so that it can be recognised and obeyed even if it's obscured (for example, by snow).

Look out for signs giving you advance warning of height restrictions. As a professional driver, you should always know the height of your vehicle or load. If you aren't sure of the safe height, stop and check.

Use the two-second rule when conditions are good and you're driving on roads carrying faster-moving traffic. Choose a fixed reference point, and when the vehicle ahead passes that point say to yourself 'Only a fool breaks the two-second rule.' If you reach the object before you finish saying this, you're too close and you need to drop back and check again.

Select an appropriate gear in good time and, if your vehicle has a dashboard-mounted lever, apply the endurance brake (retarder) in stages. Braking too much, too soon may result in locking your drive wheels.

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.

It's important to apply the footbrake before you engage 'D' (or drive), so your vehicle doesn't creep forward or roll back out of control when you're about to move away. This can be dangerous; for example, if there's another road user close behind.

After an incident, passengers who aren't obviously injured may be suffering from shock. Reassure them and keep them warm. Don't give them anything to eat or drink. Call the emergency services and keep yourself and any injured passengers calm until professional help arrives.

Slow down and be ready to stop if you see animals in the road ahead. Animals are easily frightened by noise and by vehicles passing too close to them. Stop if signalled to do so by the person in charge of the animals.

Always use the MSM routine when you're approaching a hazard. M - Mirrors: check the position of the traffic behind you. S - Signal: signal your intention to slow down or change course in good time. M - Manoeuvre: a manoeuvre is any change in position, from slowing or stopping the vehicle to turning off a busy road.

Some vehicles are fitted with an audible warning that sounds when the vehicle is reversing. This is an effective way to warn pedestrians and other road users of a reversing vehicle, but it doesn't take away the need to use effective observation all around your vehicle before and while you're reversing. Don't use the device in built-up areas between 11.30 pm and 7.00 am. Have consideration for the residents and don't disturb them with excessive noise.

Road-friendly suspension reduces the vibration caused by the impact of the wheels on the road surface.

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.

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.

The driver of a passenger-carrying vehicle needs to know the vehicle's limits. These include its weight, height, width and length, and its seating and standing capacity. The unladen weight should be displayed on the nearside of the vehicle.

Whenever possible, call the emergency services first. If you're able to give first aid, remember DR ABC. Check for Danger, then check the casualty for a Response. Check the Airway, and try to establish Breathing by gently lifting the chin up and forward. Give Compressions if necessary. Try to stop any severe bleeding. If you feel you aren't capable of carrying out first aid, consider taking some training. It could save a life.

The term 'crawler lane' doesn't mean the lane is only for extremely slow vehicles. It's advising you of an extra lane on the left. Crawler lanes are usually built on sections of road where the length of the gradient is such that some large vehicles will be slowed to the point where they become a hazard for other road users.