K Value

Written by Jerry Ratzlaff on . Posted in Civil Engineering

stopping sight distance 1K value, abbreviated as K, is the horizontal distance required to achieve a 1% change in the slope of the vertical curve.

 

K Value formula

\(\large{ K =  \frac{  L  }{ A  }  }\)   

Where:

 Units English Metric
\(\large{ K }\) = rate of vertical curvature \(\large{ft}\) \(\large{m}\)
\(\large{ L }\) = length of vertical curve \(\large{ft}\) \(\large{m}\)
\(\large{ A }\) = algebric difference in grade (%) \(\large{dimensionless}\)

 

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