How should the tram driver behave, if he notices stones in the grooves of the rails?
Show the correct answer
Correct answer
C. Remove the stones before driving through such section of the track.
Explanation
The question is about stones noticed in the grooves of the rails. The tram driver should remove them before driving over such a section of track - answer C.
A stone in the groove of a rail may get pushed under the wheel flange, which runs in the groove, and lift the wheel, which creates a risk of derailment, and at points it may block the switch blade. Driving through fast (answer A) will not throw the stones away safely - it increases the risk of derailment and damage to the wheels. A low speed (answer B) does not guarantee that the tram will not derail. So you stop the tram, secure it and remove the stones, and when this is not possible, you inform the dispatcher. Stones are sometimes placed on the tracks on purpose.
Legal basis: Art. 3 para. 1 of the Road Traffic Act (Prawo o ruchu drogowym)