If someone is deaf as well as blind, they may be carrying a white stick with a red reflective band. You can't know whether a pedestrian is deaf. Don't assume that everyone can hear you approaching.

If there's a bend or other obstruction concealing a level crossing, you won't be able to see the barriers, signals or any waiting traffic. Countdown markers, spaced equally at about 100 yard intervals, give you an early warning that you're approaching a level crossing, so you can be prepared to stop if necessary.

The colours of the reflective studs on the motorway, and their locations, are
- red - between the hard shoulder and the carriageway
- white - between the lanes
- amber - between the edge of the
carriageway and the central reservation
- green - along slip-road exits and entrances bright green/yellow - at roadworks and contraflow systems.

At the end of a one-way street, vehicles turning left will position on the left-hand side of the road and those turning right will use the right-hand side of the road. The double broken 'give way' lines will therefore run across the full width of the junction.

When approaching a zebra crossing where you intend to stop, using an arm signal can be helpful. This not only tells the vehicles behind that you intend to stop, but also informs approaching traffic and waiting pedestrians, who can't see your brake lights.

Driving a vehicle with a brake defect could be dangerous and may constitute an offence. Check the brake-fluid level regularly, using the high/low markers on the reservoir. If the fluid level is too low, it could result in loss of braking efficiency.

In icy and snowy weather, your stopping distance will be up to 10 times further than in good, dry conditions. To reduce the risk of skidding, take extra care when braking, accelerating and changing direction.

If you're travelling on an icy road, extra care will be required to avoid loss of control. Keeping your speed down and using the highest gear you can will reduce the risk of the tyres losing their grip on this slippery surface.

A continuous white line is used on many roads to indicate the edge of the carriageway. This can be useful when visibility is restricted. The line is discontinued at junctions, lay-bys, and entrances and exits from private drives.

Strict controls on exhaust emissions require a catalytic converter to be fitted to the exhaust system of all new vehicles. Catalytic converters remove most of the carbon monoxide, oxides of nitrogen and unburned hydrocarbons from the exhaust gases.

The level of electrolyte in a battery may fall below the level of the plates. If this happens, you'll need to top up the electrolyte with distilled water. Make sure that the plates in each battery cell are covered, but don't overfill the cells.

Some junctions have advanced stop lines with an area for cyclists to position themselves ahead of other traffic. You must stop at the first white line you reach. If you're unable to stop safely at the first line, you must stop at the second line, even though you'll be blocking the area reserved for cyclists.

This sign means it's illegal to overtake. It may have a black-and-white plate telling you over what distance the prohibition applies. There will normally be a sign with an 'End' plate where the prohibition ends.

A long white line with short gaps means that you're approaching a hazard. Don't cross the line unless you really need to. If you do need to cross the line, make sure that the road ahead is clear before doing so.

If your tyres show uneven or excessive wear, have the alignment checked. This is often called tracking, and it can be carried out by most garages or tyre-fitting businesses.

Using a lower gear will allow the engine braking to assist the brakes in keeping the vehicle's speed under control. Avoid coasting with the clutch held down or rolling in neutral, as there will then be no engine braking.

To reduce the risk of wheelspin when moving off on a slippery surface, use a higher gear than normal. This will reduce the amount of torque transmitted to the driven wheels. Gentle use of the accelerator will also make it easier for the tyres to keep their grip.

If you operate the brakes when air is in the hydraulic system, they'll have a spongy feel and braking efficiency will be reduced. This is because the air in the system is being compressed as you brake; hydraulic brake fluid alone can't be compressed. If you notice there's a fault with your brakes, have them checked as soon as possible. Don't drive with faulty brakes.

When it's safe to do so, you may cross the solid white line to pass a stationary vehicle or to pass a pedal cycle, horse or road maintenance vehicle if they're travelling at 10 mph or less. You may also cross the solid line to enter a side road or access a property.