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Old 10-08-2020, 08:40 PM   #31
FN # 40
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Join Date: Jun 2008
Location: Bay Area
Motorcycles: Kawasaki Versys 1000LT, Prior: Honda 600RR Graffiti, Kawi 650R
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Originally Posted by Enchanter View Post
An easy way to connect perception / reaction and distance traveled in feet per second (fps) is to just remember 1.5

Perception (0.75sec) + reaction (0.75sec) = 1.5

Distance traveled in fps is approximately 1.5 x mph.
Yes, this! ^^^

So at a speed of 30 MPH, when one perceives a threat, they will have traveled about 66 feet before they even begin to brake, or take other evasive action. That is also assuming an ideal level of attention, which is not always the case. For every second delay at 30 MPH, add another 45 feet.
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