Perhaps I'm totally misunderstanding the problem here. If one is traveling 70mph and one needs to see 3 seconds ahead, one would need to be able to see clearly over 308 feet ahead of their vehicle. If one is traveling 20mph one would need to see less than 90 feet ahead. To get a driver's license, and safely drive a car, one would need to be able to see over three times farther than one would need to be able to see to safely drive a golf cart.
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