You watch another driver weave from lane to lane to move faster than the surrounding traffic. What does the manual say about this?
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A.
Weaving to move faster than traffic flow is unlawful. Correct
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B.
Weaving is discouraged but not against the law.
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C.
Weaving is legal when the driver signals each lane change.
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D.
Weaving is permitted on interstates posted above 55 mph.
The answer is "Weaving to move faster than traffic flow is unlawful."
The manual bans weaving from lane to lane to outpace traffic flow. C is the trap for drivers who assume any lane change is legal so long as they signal each one; the signal does not cure the pattern the law is aimed at.
The traps in the wrong answers
B. Weaving is discouraged but not against the law.
The manual writes weaving into law as unlawful, not as poor practice. This answer downgrades a law to advice, the way drivers describe habits they see other cars get away with.
C. Weaving is legal when the driver signals each lane change.
Signaling every change does not cure the underlying maneuver the manual bans. This answer assumes a proper signal legalizes any lane movement, a rule of thumb the manual rejects for weaving.
D. Weaving is permitted on interstates posted above 55 mph.
The manual sets no speed-based exception for weaving. This answer invents a highway-speed exception the manual never lists.
This question tests your knowledge of Lane Changes & Merging in Illinois. Source: Illinois Rules of the Road, "Lane Usage," p.29..
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