Your speed should be based on various factors, including the condition of the road, weather and traffic and the presence of pedestrians. Always drive within the speed limit. To do this you need to know national speed limits and restrictions for different types of road and any restricted speed limits for the road you’re on. the appropriate speed for particular road weather and traffic conditions the appropriate speed to use where there are pedestrians and in traffic- calmed areas the stopping distance for your vehicle in different conditions and how to calculate a safe separation distance between yourself and the vehicle in front