What does a single solid white line indicate?
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A.
The boundary between opposing directions of traffic
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B.
Traffic lanes moving in the same direction Correct
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C.
A closed lane that no vehicle may enter
The answer is "Traffic lanes moving in the same direction"
A single solid white line marks lanes moving in the same direction on a one-way street or on the same side of a two-way road. The A pick swaps the yellow-line meaning onto a white-line question, anchoring to the rule for opposing directions that a driver learned first.
The traps in the wrong answers
A. The boundary between opposing directions of traffic
Opposing directions are marked with yellow lines, not white ones. This answer swaps the yellow-line meaning onto a white-line question.
C. A closed lane that no vehicle may enter
A closed lane is signed with cones, barricades, or arrows; a single solid white line by itself does not close a lane. This answer reads any solid paint as 'do not enter' without checking the color-and-shape rule.
This question tests your knowledge of Road Markings in California. Source: California Driver Manual, "Single Solid White Line," p.13..
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