What increases the risk of a tram skidding?
Show the correct answer
Correct answer
C. Wet leaves covering the trackway.
Explanation
The question is about the factors that increase the risk of a tram skidding. This risk is increased by wet leaves lying on the tram tracks - answer C.
Wet leaves crushed by the wheels form a slippery layer on the rails, which makes the wheels lose grip - they slip more easily when moving off and lock when braking. Heating of the rails by the sun (answer A) does not noticeably reduce grip. Sand and dust (answer B) are not in themselves the main cause of skidding - dust becomes slippery only when mixed with water, and sand is actually dropped from the sanders to prevent skidding. In autumn, on sections with trees, you drive more slowly and keep a larger following distance from the tram in front.
Legal basis: Art. 19 para. 1 of the Road Traffic Act (Prawo o ruchu drogowym)