What effect does the initial phase of the rainfall have on the condition of the trackway?
Show the correct answer
Correct answer
B. It poses a threat to skidding during start-up and braking.
Explanation
The question is about how the initial phase of rainfall affects the condition of the tram tracks. It creates a risk of skidding when moving off and when braking - answer B.
Dust, grit, grease and other dirt collect on dry rails. The first raindrops mix with them and form a slippery sludge, which reduces the grip of the wheels. Only longer rain washes this layer away. So the start of rainfall does not improve grip (answer A) and is not without effect on driving (answer C). When it starts to rain, you move off more gently, brake earlier and increase the following distance from the tram in front, and use the sander if necessary, so that the wheels do not slip or lock.
Legal basis: Art. 19 para. 1 of the Road Traffic Act (Prawo o ruchu drogowym)