What does this R15-6 sign require of a driver?
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A.
Keep motor vehicles off the light rail or railroad tracks. Correct
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B.
Stop before crossing the tracks ahead.
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C.
Yield the right of way to any approaching train.
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D.
The lane is reserved for buses and rail vehicles only.
The answer is "Keep motor vehicles off the light rail or railroad tracks."
The sign is a regulatory prohibition: motor vehicles may not travel on the light rail or railroad tracks that run beside the roadway. Drivers who read any track-related sign as a cue to stop reach for the stop-before-crossing answer, importing the rule that belongs to a crossbuck or an octagonal stop sign at the crossing itself.
The traps in the wrong answers
B. Stop before crossing the tracks ahead.
That instruction belongs to a crossbuck with a stop line or a stop sign at a rail crossing, not to this prohibition on entering the track bed. Carries over the stop-at-a-crossing rule learned first and applies it to any sign posted near tracks.
C. Yield the right of way to any approaching train.
The sign is a flat ban on driving on the tracks, not a right-of-way rule about who moves first at a crossing. Reads any track-related sign as an instruction about who yields to whom.
D. The lane is reserved for buses and rail vehicles only.
This is a prohibition on all motor vehicles using the tracks, not a transit-lane sign granting access to particular vehicles. Sees a rail symbol on a white square and treats it as a transit-only lane marker.
This question tests your knowledge of Regulatory Signs on the roads of every US state . Source: Manual on Uniform Traffic Control Devices, sign R15-6 (No Motor Vehicles On Tracks)..
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