In which of the following situations should you increase your following distance behind the vehicle ahead of you?

Increase your following distance in situations in which you may need more space to stop. These include the following: (1) The rear view of the driver of the vehicle ahead of you is blocked or the driver is making frequent, unexpected stops, which can be the case with a bus, taxi, or post office van; (2) you're on a road with poor traction, such as a wet or slippery road or an unpaved road; (3) you're driving downhill, so it will be harder for your brakes to stop your vehicle quickly.