SAG Vertical Curve Length – Connecting Descending Grades
Curves that connect descending grades forming a bowl and its design is same as crest design of vertical curves, sight distance is a major parameter in design of these curves and other parameters which are taken in account are drainage, driver comfort and sight distance.
Use this online calculator to simply your calculations.
To calculate SAG Vertical Curve Length:
Results:
Formula:
Lm = ( A×S² ) / ( 200 × (H + S ×tanβ) ) ∀ S<Lm
Lm = 2S − { ( 200 × (H + S ×tanβ) ) / A } ∀ S>Lm
If S > L, then the first formula is used, if L > S, then the second formula is used.
Where,
A - Absolute difference between g2 and g1
S - Sight Distance
Lm - Minimum Curve Length
H - Height of headlight
β - Angle of Headlight Beam
Curves that connect descending grades forming a bowl and its design is same as crest design of vertical curves, sight distance is a major parameter in design of these curves and other parameters which are taken in account are drainage, driver comfort and sight distance.
Use this online calculator to simply your calculations