White stop lines painted on each side of a railroad track show a driver:
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A.
Where to stop when a train is approaching. Correct
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B.
Where the pavement drops off at the track.
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C.
Where pedestrians may safely cross the tracks.
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D.
Where the crossing gate will lower to the road.
The answer is "Where to stop when a train is approaching."
White stop lines at rail crossings show drivers where to stop when a train is approaching. Choice D confuses the gate arm with the pavement mark; drivers picture the descending gate as the stopping cue and never look for the paint under their tires.
The traps in the wrong answers
B. Where the pavement drops off at the track.
The lines mark a stopping point, not a change in pavement condition. This answer reads the paint as a hazard marker rather than a legal stopping point.
C. Where pedestrians may safely cross the tracks.
Crosswalks span the full width of the road; rail stop lines do not mark a pedestrian path. This answer groups the white rail stop line with the white crosswalk lines because both use white paint.
D. Where the crossing gate will lower to the road.
The gate is separate equipment; the pavement mark is what sets the stopping point. This answer pictures the descending gate as the stopping cue and never looks for the paint under the tires.
This question tests your knowledge of Road Markings in Illinois. Source: Illinois Rules of the Road, "Chapter 10: Railroad Crossings, Pavement Markings," p.81..
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