That depends on the driver's reaction time, the weight of the car, the condition of its brakes,
the condition of the tires, and the material and condition of the pavement.
In the drivers' ed. manual, and often on the written license exam, it's usually recommended
that at 30 miles per hour, you leave 3 car lengths open between your car and the one
in front of you.
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At 87 miles per hour you would be traveling 459,360 feet per hour OR 127.6 feet per second.
Stopping Distance = about 56.25 feet.
55 feet
2640 feet
A plane going 300 miles per hour is going 440 feet per second. (300 * 5280 / 60 / 60) In four hours, it will have traveled 1,200 miles, or 6,336,000 feet.