You are driving on a rural road in heavy rain. Spray from vehicles ahead and oncoming traffic is reducing your visibility, and the road ahead is slightly bending so you cannot clearly see if anything is coming towards you. A slow-moving car is in front and you are considering overtaking. What should you do?

Explanation

The Highway Code Rule 166 states you must not overtake if there is any doubt, or where you cannot see far enough ahead to be sure it is safe. In heavy rain, spray and reduced visibility make it harder to see oncoming traffic, especially on bends. You should stay behind and only consider overtaking when you have a clear, unobstructed view of the road ahead. Using headlights or the horn does not make an unsafe overtake safe, and following too closely increases risk.