You approach a round yellow sign with a large black X and the letters 'RR.' According to the Texas manual, what does this sign mean?
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A.
You are within a few hundred feet of a railroad crossing Correct
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B.
A crossing gate ahead is out of service
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C.
Rail traffic yields to road vehicles at this crossing
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D.
You must stop within 15 to 50 feet of the nearest rail
The answer is "You are within a few hundred feet of a railroad crossing"
The round railroad advance-warning sign means a crossing is within a few hundred feet: slow down and be prepared to stop. Choice D is the trap because 15 to 50 feet is a real number in the same chapter, but it is the stop distance the manual sets when flashing lights or a flag person orders you to stop, not the meaning of the round advance-warning sign.
The traps in the wrong answers
B. A crossing gate ahead is out of service
Malfunctions at grade crossings are reported through the blue-and-white ENS sign, not the round yellow one. This answer invents a specialized meaning for the round sign, ignoring that its purpose is simple advance warning.
C. Rail traffic yields to road vehicles at this crossing
The manual's rule is that drivers stop for approaching trains, not the other way around. This answer reverses the standing right-of-way rule between trains and road vehicles.
D. You must stop within 15 to 50 feet of the nearest rail
The 15-to-50-foot figure is the stopping distance triggered by flashing lights or a flag person. This answer pulls the nearby 15-to-50-foot stop distance from the same chapter and attaches it to the wrong sign.
This question tests your knowledge of Warning Signs in Texas. Source: Texas Driver Manual, "Railroad Warning Signs," p.32..
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