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Stopping Distance: Why Speed Multiplies Risk
Speed limits, the basic speed law, the 3-second rule, and why stopping distance grows faster than speed.
What this lesson covers
- Name the three stages that make up total stopping distance
- Explain why braking distance grows with the square of speed rather than in direct proportion
- Estimate, using the interactive tool, how much farther it takes to stop at a higher speed or in worse conditions
- Connect stopping distance to why the 3-second following rule needs to be increased in some situations
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