What must you do while driving on a highway in heavy rain to avoid losing control of your vehicle?

In heavy rain, slowing down your vehicle is crucial to maintain control and ensure safety. Rain can create slick road conditions, particularly when it first begins to fall, as it mixes with dirt and oil on the roadway. Reducing your speed helps prevent hydroplaning, which occurs when the tires lose contact with the road due to water buildup, leading to a loss of steering and braking control. By driving at a lower speed, you enhance your ability to react to sudden stops or obstacles, improving your overall safety in adverse weather conditions.

Conversely, speeding up in such conditions can lead to a greater risk of losing control, as it can exacerbate the effects of slippery roads. Maintaining the same speed could also lead to traction issues, while frequent lane changes can be unpredictable for both you and other drivers, increasing the chances of accidents. Therefore, slowing down is the most effective and responsible action to take when driving in heavy rain.