You turn on your windshield wipers because rain has started. What does Illinois law require you to do at the same time?
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A.
Switch on your hazard flashers.
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B.
Use only parking lights.
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C.
Turn on your headlights. Correct
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D.
Activate the high beams.
The answer is "Turn on your headlights."
Illinois law ties the two together directly: wipers on, headlights on. Choice A is where a driver goes who has been taught to signal bad-visibility weather with the hazard flashers, a habit that mixes up a stopped-vehicle rule with a moving-vehicle law.
The traps in the wrong answers
A. Switch on your hazard flashers.
Hazard flashers are for a stopped or disabled vehicle, not moving traffic in rain. This answer borrows a shoulder-side habit, using the flashers to advertise weather when the law asks only for headlights.
B. Use only parking lights.
Parking lights alone are not enough; the law names headlights. This answer reaches for an older setting from before daytime running lights became standard.
D. Activate the high beams.
High beams reflect off rain and blind oncoming drivers; the law names headlights, not the high setting. This answer reads better-vision into a law that is really about being seen by other drivers.
This question tests your knowledge of Defensive Driving in Illinois. Source: Illinois Rules of the Road, "Chapter 11: Safe Driving Tips, Weather Conditions, Rain," p.85..
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