Double solid white lines on a freeway most often mark:
-
A.
The center line separating opposing directions of traffic
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B.
The barrier between a regular lane and a carpool lane Correct
-
C.
The edge of the shoulder where drivers may stop
The answer is "The barrier between a regular lane and a carpool lane"
Double solid white lines separate the regular travel lanes from a preferential-use lane, most often the carpool or HOV lane. Choice A is the trap for drivers who see 'double solid' and reach for the double-yellow meaning, since doubling registers to them as an opposing-traffic marker rather than an HOV divider.
The traps in the wrong answers
A. The center line separating opposing directions of traffic
Yellow, not white, is the color the manual uses for opposing directions of travel. This answer seizes on the 'double solid' cue and lands on the double-yellow meaning without checking the paint.
C. The edge of the shoulder where drivers may stop
The shoulder edge is a single solid white line, not a double one, and stopping on freeway shoulders is limited to emergencies. This answer assumes any freeway marking is about the shoulder rather than about a lane divider.
This question tests your knowledge of Lane Changes & Merging in California. Source: California Driver's Handbook, "Double Solid White Lines," p.14..
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