How should you respond to changing road conditions like rain or snow?

Responding to changing road conditions such as rain or snow involves adapting driving behavior to ensure safety. Reducing speed is crucial because slippery surfaces can significantly increase stopping distances and decrease control over the vehicle. In adverse weather, it's essential to drive slower than you would on dry roads to maintain manageable control and reaction times.

Increasing following distance is equally important. During rain or snow, vehicles need more space to stop safely, as wet or icy roads can lead to longer stopping distances. By increasing the gap between your vehicle and the one in front, you provide yourself with additional time to react to unexpected situations, such as sudden stops or skids.

Other options provided do not promote safe driving practices under adverse weather conditions. For example, increasing speed would compromise control and increase the likelihood of accidents. Using high beams can create glare in rain or snow, reducing visibility rather than improving it. Changing routes may not always be feasible or necessary, and careful driving on existing roads with appropriate adjustments is often the best option.