Vertical Curve Length – A Transition Curve
Vertical curves are important elements in geometric design of highways, providing transition between two sloped roadways. These are parabolic curves and are assigned stationing based on horizontal axis.
Vertical Curve Length
To calculate Vertical Curve Length:

Passing Sight Distance (S)

Initial Grade (g_{1})
%

Final Grade (g_{2})
%

Results:

Minimum Curve Length (L_{m}) in meter

Minimum Curve Length (L_{m}) in foot