Which of the following is true about the effects of tailgating on driving safety?

Tailgating, or following another vehicle too closely, significantly increases the risk of crashes. This behavior reduces the driver's ability to react to sudden stops or emergencies, as there is insufficient space to maneuver or brake safely. When a vehicle is tailgating, the driver has less time to perceive and respond to changes in the traffic situation ahead. This contributes to a higher likelihood of rear-end collisions, particularly in situations where the vehicle in front has to stop abruptly.

The other possible answers do not accurately reflect the impacts of tailgating. For instance, tailgating does not allow for quicker reaction times; instead, it limits the driver's response capabilities. While one might assume that maintaining a close distance keeps traffic moving, it can actually lead to hazardous conditions that cause stop-and-go traffic, ultimately reducing overall traffic flow. Lastly, tailgating does not encourage safer driving; rather, it fosters aggressive driving behaviors and increases tension on the road.

Thus, the assertion that tailgating increases the risk of crashes encapsulates the primary safety concern associated with this driving behavior.