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

The differential allows the drive wheels to rotate at different speeds; this is necessary for the vehicle to negotiate corners and bends. On a slippery surface, however, it can cause problems: if one wheel has less traction, it can spin, resulting in a complete loss of drive. The 'diff-lock' prevents the wheels from turning independently and so helps to stop this happening.

If a one-way street has two lanes, you can use either lane and overtake on either side. Use the lane that's more convenient for your destination unless directed by road signs or markings.

In windy weather, try to avoid routes where you would have to drive across suspension bridges and other exposed stretches of road. Plan a route that takes you across lower ground and where you'll be less exposed.

In cold weather, diesel fuel can solidify as it starts to freeze. This is known as waxing. Waxing prevents the fuel from flowing properly and this can stop the engine from running.

If you try to overtake another vehicle and realise that you're unable to complete the manoeuvre, ease off the accelerator and drop back behind the vehicle. If the vehicle you're trying to overtake is large, then it will take a long time to pass. You should assess whether you have the time and power to complete the manoeuvre before you try to overtake.

Give way to buses whenever you can do so safely, especially when they signal to pull away from bus stops. Look out for people who have left the bus and wish to cross the road. Also look for people rushing to catch a bus: they may be more concerned about catching the bus than watching for traffic.

When your steering wheels are locked - as can happen in a skid - you can't steer the vehicle. Anti-lock brakes help you to keep steering control while you're braking heavily, but they aren't a substitute for good forward planning. Anticipation and planning ahead will minimise the risk of skidding more effectively than relying on your braking system.

The law requires you to use projection markers for long or wide loads. It's the driver's responsibility to keep the markers clean and securely fixed. They must also be independently lit at night.

Blind spots can occur when bodywork - such as a door or window pillar - restricts your view. Different types of vehicle have different blind spots.

If your vehicle is involved in a traffic incident, you must stop. Follow the guidance set out in The Highway Code if there's injury or damage to any other person, vehicle or property.

Check all medicines for their side-effects, such as drowsiness. If you're unsure, ask your doctor or pharmacist to explain how you might be affected by the medication.

High-value cargoes are often targeted by thieves. Operators are recommended to seek advice from their local crime-prevention officer to help prevent their vehicles and loads from being stolen.

If you check the engine oil level when your vehicle is standing on a slope, the reading on the dipstick won't be accurate. Park it on flat ground, so the dipstick shows the true level.

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.

Toucan crossings can be used by cyclists and pedestrians. Some cycle routes lead cyclists to these crossings. Always look out for cyclists, as they're likely to be approaching much faster than pedestrians.

Continuous use of the brakes can result in them overheating and losing their effectiveness. This is known as 'brake fade' and it's most likely on long downhill gradients.