When are you required to stop at an Oregon railroad crossing?
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A.
Only when following a school bus or hazmat vehicle that must stop at the tracks.
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B.
When red lights flash, a train approaches, a stop sign is posted, or a flagger signals stop. Correct
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C.
Only when an approaching train is clearly visible on the tracks ahead.
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D.
Only when the crossing gate has lowered completely across the road.
The answer is "When red lights flash, a train approaches, a stop sign is posted, or a flagger signals stop."
You must stop at an Oregon railroad crossing whenever any of four triggers fires: flashing red lights, an approaching train visible or close enough that crossing would be hazardous, a posted stop sign, or a flagger signaling stop. Machine signals, human signals, posted signs, and your own judgment about train proximity each stand alone as reasons to stop. A driver drawn to A is pulling forward the manual's separate note that school buses and hazmat vehicles must stop at the tracks and reading it as the only trigger that obligates any driver.
The traps in the wrong answers
A. Only when following a school bus or hazmat vehicle that must stop at the tracks.
Being prepared to stop behind a school bus or hazmat vehicle is one situation, not the rule itself. Flashing lights, an approaching train, a posted stop sign, or a flagger each require you to stop regardless of what vehicle is ahead. This answer misreads the manual's note that school buses and hazmat vehicles must stop at railroad tracks as the driver's own sole stop trigger, ignoring the four triggers listed for all drivers.
C. Only when an approaching train is clearly visible on the tracks ahead.
Flashing red lights, a posted stop sign, or a flagger signaling you to stop each require a stop on their own, even when no train is visible. This answer treats a visible train as the only trigger; ignores flashing lights, a posted stop sign, and a flagger as independent triggers listed in the manual.
D. Only when the crossing gate has lowered completely across the road.
The flashing red lights themselves require a stop; gates are a backup, and not every Oregon crossing has gates. This answer treats a fully lowered gate as the sole trigger; the manual lists flashing lights, train proximity, a posted stop sign, and a flagger as separate triggers.
This question tests your knowledge of Sharing the Road in Oregon. Source: Oregon Driver Manual, "Railroad Crossings, Light Rail & Street Cars," p.64..
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