Delaware Driver Education State Practice Test

What is indicated by a sign stating "roadway slippery when wet"?

1. All roads are safe in rain

2. The first half hour of rain is particularly hazardous

3. Slow driving is not necessary in dry conditions

4. Only rural roads are affected

The correct answer is: The first half hour of rain is particularly hazardous

The indication of a sign that states "roadway slippery when wet" highlights the increased danger that can occur when rain begins to fall, especially during the initial period when the rain starts to mix with oil and debris on the roadway. This creates a slick surface that can significantly reduce traction and increase the likelihood of losing control of the vehicle. In particular, the first half hour of rain is considered particularly hazardous because the roadway is typically at its most slippery during this time. The rain has not yet adequately washed away the oils and pollutants on the surface, which can lead to a dangerous driving condition. Drivers should be especially cautious during this period, reducing their speed and increasing their following distance to maintain control of their vehicles. This sign does not imply that all roads are safe in rain, nor does it suggest that slow driving is unnecessary in dry conditions. It also doesn't limit the warning to only rural roads, as all types of roads can be affected when wet, particularly in the initial phase of rainfall.