Talk:Stopping sight distance

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The values in the table don't match the equation. I don't know if the equation or the table is correct but if the formula is correct the higher values of speed should have stopping distances in the thousands.

69.54.143.208 06:01, 15 March 2007 (UTC)Theodore

I have removed both the table and the formula. Obviously, for such a function with so many variables, a simple quadratic seems hardly admissible for application for every type of car. I have added a note regarding this. --Ķĩřβȳ♥ŤįɱéØ 06:07, 15 March 2007 (UTC)

I just got a regression using the data starting at zero and incrementing until 70. It is Y = 0.06X^2+1.1X.

69.54.143.208 06:09, 15 March 2007 (UTC)Theodore

I found a page that has info that says: d = 1.47 V t where: d = brake reaction distance, ft V = design speed, mph t = brake reaction time, sec and d = 1.075 V^2/a where: d = braking distance, ft V = design speed, mph a = deceleration rate, 11.2 ft/s^2 at http://www.ecs.umass.edu/baystate_roads/technotes/35_stopping_sight_distance.pdf

69.54.143.208 06:16, 15 March 2007 (UTC)Theodore