Getting enough rest improves driving performance.

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Getting enough rest is essential for safe driving because fatigue slows your reaction time, reduces vigilance, and impairs judgment and attention. When you’re well-rested, you respond to hazards more quickly, stay in your lane, and maintain steady focus, which lowers crash risk on any trip. The idea that rest would hinder performance or have no effect isn’t supported by how fatigue affects drivers; fatigue can degrade performance even on short trips. So, improving rest leads to better driving performance.