What does the manual say a ONE WAY sign means?
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A.
Traffic must yield to vehicles coming from the opposite way
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B.
Traffic must stop before entering the street shown by the sign
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C.
Traffic may move in either direction during off-peak hours
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D.
Traffic may move only in the direction the sign points Correct
The answer is "Traffic may move only in the direction the sign points"
The ONE WAY sign permits travel only in the direction the arrow indicates. Choice C tempts drivers thinking of reversible lanes on bridges and in tunnels, where a lane's direction changes at rush hour; a ONE WAY street never reverses.
The traps in the wrong answers
A. Traffic must yield to vehicles coming from the opposite way
No opposing flow is expected; the other way is forbidden. This answer treats the ONE WAY street as two-way, applying the yield-to-oncoming-traffic habit from ordinary unprotected left turns to a direction the sign actually forbids.
B. Traffic must stop before entering the street shown by the sign
No halt is required by this sign; it dictates direction only. This answer confuses the ONE WAY sign with the STOP or DO NOT ENTER signs described nearby in the Regulatory section, adding a halt requirement a purely directional sign does not carry.
C. Traffic may move in either direction during off-peak hours
The permitted direction never reverses. This answer borrows the reversible-lane rule from lane-use control signals over bridges, tunnels, and city main roads, where a lane's direction of travel changes to ease rush-hour flow.
This question tests your knowledge of Regulatory Signs in Pennsylvania. Source: Pennsylvania Driver Manual, "Regulatory Signs," p.11..
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