Which of the following best explains why driving much slower than traffic is dangerous?

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Driving much slower than the surrounding traffic creates a moving obstacle and disrupts the normal flow of vehicles. When most drivers are traveling at a higher speed, they rely on a predictable pace to judge gaps and timing for passing or changing lanes. If you’re far slower, others must slow down well in advance or attempt to pass, which requires careful lane changes and clear gaps. If a gap isn’t available or a pass is misjudged, the result can be a collision—often from a driver deciding too late to pass or from abrupt braking behind you. The speed difference itself increases the likelihood of crashes because it changes reactions, reduces predictability, and forces risky maneuvers. In short, the bigger the gap between your speed and the flow of traffic, the higher the chance of a collision.