Car permit · Speed

Minimum speed 45: Why do some highways post minimum speed signs?

Minimum speed 45

Correct answer: To help traffic keep moving smoothly.

Answer options

  1. ATo help traffic keep moving smoothly. Correct
  2. BTo judge whether traffic signals will be needed later.
  3. CTo guarantee the safety of pedestrians.

Why

Vehicles moving far below the speed of everyone else disrupt the flow and invite rear-end crashes and risky passing, so some highways set a minimum speed to keep traffic moving evenly.

About this question

Topic: Speed   License: Car permit

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Where it applies: Asked in every state. Compare permit tests by state

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This question is part of Choosing a Safe Speed (15 questions). Take the full set and check your score.

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