You are driving in moderate traffic on a four-lane highway behind a slow-moving vehicle. Before changing lanes, you must:
Before changing lanes, check highway and traffic conditions ahead, to the sides, and to the rear of your vehicle. After checking your mirrors, check your blind spot by turning your head and looking over your shoulder in the direction of your move. Signal your intention at least 100 feet before you start the lane change. Don't move into a space between vehicles if doing so would interfere with their safe following distances.
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