You should reduce your speed below the posted speed limit whenever conditions make it unsafe to travel at the maximum permitted speed. This could include heavy rain, snow, ice, fog, sharp bends, poor visibility or heavy traffic. You should also slow down where there are vulnerable road users, such as pedestrians, cyclists, horse riders or children.
Remember, a speed limit tells you the maximum speed you may legally drive, not the speed you should always travel at. You must choose a speed that allows you to remain in control, identify hazards and stop safely within the distance you can see to be clear.
Speed-Limit Example
You are driving on a country road with a 60 mph speed limit, but there is a sharp bend ahead and you cannot see what is around it. Although the limit is 60 mph, it would be unsafe to approach the bend at that speed. Slow down to a speed that allows you to deal safely with anything you might encounter.
Quick Self-Test
You’re driving on a road with a 60 mph speed limit, but visibility ahead is poor. What should you do?
A) Continue at 60 mph because it is the legal limit
B) Speed up to clear the area quickly
C) Reduce your speed to suit the conditions
D) Stop immediately