You're at an Oregon intersection controlled by a traffic light and want to make a U-turn. Is this allowed?
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A.
Allowed at these intersections by default.
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B.
Prohibited unless a sign specifically permits the turn. Correct
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C.
Allowed only when the signal shows a green arrow.
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D.
Allowed whenever no oncoming traffic is visible.
The answer is "Prohibited unless a sign specifically permits the turn."
U-turns are prohibited at intersections controlled by a traffic light unless a sign specifically permits the turn. The default at intersections with traffic lights is no U-turn; a posted sign is what unlocks it. Drivers sometimes assume that a green left-turn arrow includes U-turn permission. It does not, unless a sign says so.
The traps in the wrong answers
A. Allowed at these intersections by default.
The default at an intersection with a traffic light is no U-turn; a sign is required to permit it. This answer inverts the rule by treating those intersections as default-permitted rather than default-prohibited.
C. Allowed only when the signal shows a green arrow.
A green arrow does not grant U-turn permission; a posted sign does. This answer treats a green left-turn arrow as the unlock condition, which the manual does not say.
D. Allowed whenever no oncoming traffic is visible.
Visibility of oncoming traffic does not unlock U-turns at a signal; signage does. This answer confuses the 500/1,000-foot visibility rule (which applies between intersections and outside city limits) with the traffic-signal rule.
This question tests your knowledge of Turning in Oregon. Source: Oregon Driver Manual, "U-Turns," p.41..
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