A vehicle that was visible in your mirror disappears as you prepare to change lanes. What must you do before moving over?
Correct answer: B – Look over your shoulder toward the lane you plan to enter
Before changing lanes, check the rearview and side mirrors for traffic. You must also look over your shoulder in the direction you intend to move because a vehicle may be near a rear corner where your mirrors do not show it. Change lanes only after confirming that the intended lane is clear.
Source: State of Connecticut Driver's Manual — “Changing Lanes”


