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| Applies To | ||

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| Product(s): | InRoads | |

| Version(s): | 08.11.07.615 | |

| Environment: | N/A | |

| Area: | Geometry | |

| Subarea: | ||

| Original Author: | Jacquelyn Pettus, Bentley Technical Support Group | |

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What is a K-value?

The K-value is the horizontal distance required to achieve a 1% change in the slope of the vertical curve.

K=L/A

where L = length of curve and A = absolute value of difference in grades

"K” factors for various anticipated operating speeds are given in the AASHTO Green Book.