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You need a _______ gap whenever you change lanes, enter a roadway, or when your lane merges with another travel lane.

  1. four-second

  2. one-second

  3. three-second

  4. two-second

The correct answer is: four-second

When changing lanes, entering a roadway, or merging with another travel lane, it is essential to ensure a safe distance between your vehicle and other vehicles around you. By maintaining a four-second gap, you allow yourself enough time to react to any sudden changes in traffic conditions, such as a car braking in front of you or a vehicle switching lanes unexpectedly. This increased following distance helps prevent accidents and promotes overall road safety. Thus, the correct answer is A. In comparison, the other options, such as one-second, three-second, and two-second gaps, might not provide you with enough time to react appropriately in case of sudden changes in the traffic flow, potentially leading to unsafe driving conditions and an increased risk of collision.