Your light turns green, but vehicles are still finishing their movement through the intersection. What must you do?
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A.
Proceed at once since your signal is green
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B.
Yield to vehicles already in the intersection Correct
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C.
Sound your horn to alert the other drivers to clear
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D.
Back up slowly to give the intersection more room
The answer is "Yield to vehicles already in the intersection"
A green light does not override vehicles already in the intersection; you yield to them before entering. Choice A tempts anyone who reads green as full clearance, but the manual lists this among the yield situations even after the light changes.
The traps in the wrong answers
A. Proceed at once since your signal is green
A green light does not override vehicles already in the intersection; the manual lists this as a yield situation. This answer reads a green as full clearance, forgetting that vehicles caught in the intersection from an earlier phase keep the right of way.
C. Sound your horn to alert the other drivers to clear
A horn does not shift right of way; the wait is on you, not on the drivers already in the intersection. This answer uses a horn to hurry vehicles that have the right of way, a habit that reverses who owes the wait.
D. Back up slowly to give the intersection more room
Backing up in an intersection creates a new hazard; the rule is to hold your position and yield. This answer adds a reverse maneuver the manual never calls for, coming from a general give-them-room instinct.
This question tests your knowledge of Right of Way in Illinois. Source: Illinois Rules of the Road, "Right of Way," p.26..
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