What is one reason why underestimating speed while driving is dangerous?

Underestimating speed while driving is dangerous primarily because it can lead to unsafe distances from other vehicles. When a driver misjudges their speed, they may not maintain an appropriate following distance. This can prevent them from having enough time to react to sudden stops or slowdowns from the vehicle in front. Maintaining a safe distance is crucial for allowing adequate reaction time to avoid collisions, especially in situations where traffic dynamics change quickly. Understanding and accurately gauging your speed helps ensure that you can respond appropriately to the behaviors of other drivers and road conditions.