Which is true regarding roads and weather conditions?

The assertion that roads are most slippery when it first starts to rain is grounded in the science of how rain interacts with road surfaces. Initially, rainwater mixes with the oils and debris that have accumulated on the pavement, creating a slick surface. As the rain continues, the water helps wash away the oils and dirt, which can improve traction. Therefore, during the initial moments of rainfall, drivers should be particularly cautious due to this slippery condition, as it poses a higher risk of losing control.

The other options do not accurately reflect the relationship between rain and road conditions. For instance, it's not true that roads become slippery only when it snows; they can be slippery in various wet conditions, including rain. Similarly, roads tend to become more dangerous in the first few minutes of rain due to the oil slick rather than less slippery. Wet conditions undeniably impact driving and increase the need for caution, contrary to the claim that they do not affect driving at all.