Why is it dangerous to tailgate another vehicle?

Tailgating another vehicle is particularly dangerous because it reduces your reaction time in case the vehicle in front of you makes a sudden stop. When following too closely, you have less time to respond to changes in traffic conditions. If the car ahead suddenly slams on its brakes or encounters an obstacle, a tailgater may not be able to react in time to prevent a collision. Maintaining a safe following distance allows ample space to react appropriately, thereby significantly reducing the risk of an accident.

The other choices do not accurately reflect the implications of tailgating. Although being noticed by police may occur while tailgating, it is not a primary safety concern. Similarly, tailgating does not lead to enhanced fuel efficiency; in fact, it can lead to erratic driving, which often decreases fuel economy. Lastly, while visibility might seem better when closely following a vehicle, it actually obstructs the driver's view of the road ahead, causing a heightened risk of overlooking hazards and reacting too slowly.