Final answer:
You should keep a minimum of a three-second gap between your vehicle and the vehicle in front to maintain a safe following distance, adjusting for road and driving conditions as needed.
Step-by-step explanation:
It is generally recommended to keep a minimum of a three-second gap between your vehicle and the vehicle in front of you. This allows for a safe distance to react and stop in case the vehicle in front makes a sudden maneuver or has to brake unexpectedly. Factors such as road conditions, speed, and the driver's attention can affect the required following distance, so in some situations, you may need to increase this gap to ensure safety.