Safe Driving第 33 / 120 题
The same 40-foot vehicle is now traveling at 55 mph on dry pavement. What following distance should you keep?
a.4 seconds
b.3 seconds
c.5 seconds
d.2 seconds
解析
Above 40 mph you add one second to the length-based figure, so 4 seconds becomes 5 seconds. Keeping only 2, 3, or 4 seconds leaves too little room for the longer stopping distance at highway speed.
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