Heavy rain or stormy conditions - in dry conditions driving at 50kph, your safe stopping distance is 25m. However, in wet conditions, this increases by 40% to 35m. At 100kph a safe stopping distance in dry conditions is 78m. In wet conditions this increases by 68% to 123m. If you see surface water ahead, slow down in advance. During a storm or heavy winds, do not park under trees or overhanging structures.
Fog or misty conditions - in dense fog, you should consider if the journey really is necessary. When driving in fog, switch on your rear fog lamp. It will allow others to see you sooner. Remember to switch off your fog lamps when foggy conditions have subsided! Use dipped headlights, as with snow, high beams will be reflected back at the driver, and make conditions worse. Stay in lane and avoid overtaking. Pay close attention to road markings to avoid disorientation.
Snow and ice conditions - when possible, carry a can of de-icer, a plastic windscreen scraper, a first aid kit, a mobile and charger, a torch and batteries, jump leads & tow rope, a warning triangle, a high visibility jacket, your car tool kit and winter clothes. A simple, but invaluable addition is a small shovel to allow you dig out snow and clear in front of wheels. In advance, check your battery, anti-freeze, lights/bulbs, tyres, wipers, fluids, fuel, heater and demister - in addition to your normal recommended vehicle checks. Try to avoid hill climbs or descents by planning your journey in advance. Descend an incline in a lower gear, allowing the engine to control speed.
Flood conditions - if you live in an area where flooding may occur, move your vehicle to higher ground. Do not drive unless your journey is absolutely necessary. Do not attempt to drive through water if you are unsure of the depth - 50cm of water can float a car. Observe other vehicles, kerbs, posts, railings, hedging or fences as indicators of water depth. If in doubt, stop!