What effect does a wet road surface have on a vehicle’s braking ability?
- It reduces the braking distance of that required on a dry surface.
- It makes no difference to the required braking distance.
- Modern tyres provide grip on a wet road as effectively as on a dry road.
- Correct answerGenerally, it doubles the braking distance of that required on a dry surface.
Explanation
When it is wet, your tyres do not grip the road surface as well as when it is dry and your stopping distance is increased. For these reasons you should slow down during or after rain and keep a greater distance from the vehicle in front.
Read in Chinese
湿滑路面对车辆制动能力有何影响？
- 它减少了在干燥路面上所需的制动距离。
- 这对所需的制动距离没有影响。
- 现代轮胎在湿路面上的抓地力与在干路面上一样有效。
- 通常，它会使所需的制动距离增加一倍。
在潮湿的情况下，轮胎对路面的抓地力不如干燥时，制动距离会增加。因此，在下雨时或雨后应减速行驶，并与前车保持更大的距离。