The highest point of the bridge is in the centre, so a large vehicle might have to move to the centre of the road to have enough room to pass under the bridge.

Trams are powered by electricity and therefore don't emit exhaust fumes. They ease traffic congestion by offering drivers an alternative to using their car, particularly in busy cities and towns.

Parking your motorcycle on soft ground might cause the stand to sink in, and the machine could fall over. The ground should be level, as well as firm, to keep the motorcycle stable. Use off-road parking or motorcycle parking areas when they're available.

If possible, lay the casualty down. Protect yourself from exposure to blood and, when you're sure there's nothing in the wound, apply firm pressure to it using clean material.

This sign is found on slow-moving or stationary works vehicles. If you wish to overtake, do so on the left, as indicated. Be aware that there might be workmen in the area.

In cold and wet weather, your visor may fog up. If this happens when you're riding, choose somewhere safe to stop, and wipe it clean with a damp cloth. Special anti-fog products are available at motorcycle dealers.

Take care if you're carrying a heavy load on your motorcycle. Try to carry the weight as low down as possible - ideally in panniers, with the weight evenly spread on each side. You may need to adjust your tyre pressures, your headlight aim and your rear shock-absorber preload setting.

Drive chains wear and need frequent adjustment and lubrication. If the drive chain is worn or slack, it can jump off the sprocket and lock the rear wheel. When you've adjusted the chain tension, you need to check the rear wheel alignment. Marks by the chain adjusters may be provided to make this easier.

You won't be able to see as far ahead in fog as you can on a clear day. You'll need to reduce your speed so that, if a hazard looms out of the fog, you have the time and space to take avoiding action. Travelling in fog is hazardous. If you can, try to delay your journey until it has cleared.

You won't be able to find a through route to another road. Use this road only for access.

Check your drive chain regularly; adjust and lubricate it if necessary. It needs to be adjusted until the 'free play' is as it says in the vehicle handbook. If the chain is too loose, it can jump off its sprocket and lock your rear wheel while you're riding.

The licensing authorities hold the records of all vehicles, drivers and riders in Great Britain and Northern Ireland. They need to keep their records up to date and you must notify them if any aspect of your health affects your ability to ride your motorcycle.

A ford is a crossing over a stream that's shallow enough to drive or ride through. After you've gone through a ford or deep puddle, your brakes will be wet and they won't work as well as usual. To dry them out, apply a light brake pressure while moving slowly. Don't travel at normal speeds until you're sure your brakes are working properly again.

Some helmet straps have a velcro tab in addition to the main fastening, which is intended to secure the strap so that it doesn't flap in the wind. It shouldn't be used on its own to fasten the helmet.

There are a number of things you can do to help, even without expert training. Be aware of further danger from other traffic and fire; make sure the area is safe. People may be in shock. Don't give them anything to eat or drink. Keep them warm and comfortable and reassure them. Don't move injured people unless there's a risk of further danger.

This sign is found where a shallow stream crosses the road. Heavy rainfall could increase the flow of water. If the water looks too deep or the stream has swelled over a large distance, stop and find another route.

The minimum insurance cover required by law is third-party only. This covers the other people and vehicles involved in a collision, but not you or your vehicle. Also, basic third-party insurance won't cover you for theft or fire damage. Make sure you read your policy carefully and understand what it covers.

Be cautious, especially if there's a bend in the road and you're unable to see well ahead. If you have to pass pedestrians, leave them plenty of room. You might have to use the right-hand side of the road, so look well ahead and in your mirrors before you pull out.

The lifesaver glance makes you aware of what's happening behind and alongside you before you alter your course. This glance must be timed so that you still have time to react if it isn't safe to carry out your manoeuvre.

A rumble device consists of raised markings or strips across the road, designed to give drivers an audible, visual and tactile warning. These devices are used in various locations, including in the line separating the hard shoulder and the left-hand lane on the motorway and on the approach to some hazards, to alert drivers to the need to slow down.

Vehicles that are used to carry children to and from school will be travelling at busy times of the day. If you're following a vehicle with this sign, be prepared for it to make frequent stops. It might pick up or set down passengers in places other than normal bus stops.

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. Don't try to intimidate them by driving too closely.

On a quiet country road, always be aware that there may be a hazard just around the next bend, such as a slow-moving vehicle or pedestrians. Pedestrians are advised to walk on the right-hand side of the road if there's no pavement, so they may be walking towards you on your side of the road.

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

It's important to wear good boots when you ride a motorcycle. Boots protect your feet and shins from knocks, and give some protection in a crash. They also help keep you warm and dry in cold or wet weather.

When you get onto a motorcycle, you should get on from the left side to avoid putting yourself in danger from passing traffic. You should also apply the front brake to prevent the motorcycle from rolling either forwards or backwards.

The fuel in your motorcycle can be a dangerous fire hazard. Don't use a naked flame if you can smell fuel, and don't smoke when refuelling.

Have information about your motorcycle and the number of the phone you're using ready before you call from an emergency telephone. For your own safety, face the traffic during the call.

Check the tyre pressures when the tyres are cold. This will give you a more accurate reading. The heat generated on a long journey will raise the pressure inside the tyre.

When a smart motorway is operating, you must follow the mandatory signs on the gantries above each lane, including the hard shoulder. Variable speed limits help keep the traffic moving and also help to prevent bunching.