Which type of driving condition requires extra caution and reduced speed?

Driving conditions characterized by heavy rain or snow necessitate extra caution and reduced speed due to the significant impact these weather phenomena have on vehicle handling and road traction. Rain can lead to slippery roads, increasing the risk of hydroplaning, while snow can create a layer of ice or accumulate on the roadway, making it difficult to stop or maintain control over the vehicle. Reduced visibility is also a common issue during heavy rain or snowfall, which can hinder a driver's ability to see other vehicles, pedestrians, and road signs. Therefore, adjusting speed appropriately in such conditions is crucial for safety; it allows drivers more time to react to unexpected situations and helps maintain vehicle control.