What is the recommended action for drivers during a heavy downpour with limited visibility?

During a heavy downpour with limited visibility, pulling off the road and waiting for the rain to lessen is the recommended action. This approach prioritizes safety by reducing the risk of accidents that could occur due to poor visibility and challenging driving conditions. When visibility is severely restricted, even driving at a reduced speed can still pose significant risks, as other drivers may not be able to see your vehicle or may be unable to react appropriately to changing conditions.

Waiting safely off the road allows you to evaluate the situation when conditions improve, ensuring that you can proceed with a clearer vision and a better understanding of the road conditions. Using only fog lights, while potentially helpful in certain circumstances, does not adequately improve visibility during heavy rain. Additionally, turning around or seeking another route may not always be feasible or safe in sudden weather events, especially if the road conditions are similarly hazardous elsewhere.

Thus, choosing to wait for the rain to lessen allows for a more cautious and conscious decision-making process, helping to ensure the safety of all road users.