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The Length of Parabolic Summit Curve is the vertical curve with a gradient upwards. Check FAQs
LSc=N(SSD2)8H
LSc - Length of Parabolic Summit Curve?N - Deviation Angle?SSD - Stopping Sight Distance?H - Height of Eye Level of Driver above Roadway?

Length of Summit Curve when Length of Curve is greater than OSD or ISD Example

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With units
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Here is how the Length of Summit Curve when Length of Curve is greater than OSD or ISD equation looks like with Values.

Here is how the Length of Summit Curve when Length of Curve is greater than OSD or ISD equation looks like with Units.

Here is how the Length of Summit Curve when Length of Curve is greater than OSD or ISD equation looks like.

213.3333Edit=0.08Edit(160Edit2)81.2Edit
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Length of Summit Curve when Length of Curve is greater than OSD or ISD Solution

Follow our step by step solution on how to calculate Length of Summit Curve when Length of Curve is greater than OSD or ISD?

FIRST Step Consider the formula
LSc=N(SSD2)8H
Next Step Substitute values of Variables
LSc=0.08(160m2)81.2m
Next Step Prepare to Evaluate
LSc=0.08(1602)81.2
Next Step Evaluate
LSc=213.333333333333m
LAST Step Rounding Answer
LSc=213.3333m

Length of Summit Curve when Length of Curve is greater than OSD or ISD Formula Elements

Variables
Length of Parabolic Summit Curve
The Length of Parabolic Summit Curve is the vertical curve with a gradient upwards.
Symbol: LSc
Measurement: LengthUnit: m
Note: Value should be greater than 0.
Deviation Angle
Deviation Angle of Vertical curve is the algebraic difference in grades or gradiests.
Symbol: N
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
Stopping Sight Distance
Stopping Sight Distance is defined as distance provided on the road before a sharp turn.
Symbol: SSD
Measurement: LengthUnit: m
Note: Value should be greater than 0.
Height of Eye Level of Driver above Roadway
Height of eye level of driver above roadway surface.
Symbol: H
Measurement: LengthUnit: m
Note: Value should be greater than 0.

Other Formulas to find Length of Parabolic Summit Curve

​Go Length of Summit Curve for Stopping Sight Distance when Curve Length is less than SSD
LSc=2SSD-(((2H)0.5+(2h)0.5)2N)
​Go Length of Summit Curve for Stopping Sight Distance when Curve Length is more than SSD
LSc=NSSD2((2H)0.5+(2h)0.5)2
​Go Length of Summit Curve when Length of Curve is less than OSD or ISD
LSc=2SSD-(8HN)

How to Evaluate Length of Summit Curve when Length of Curve is greater than OSD or ISD?

Length of Summit Curve when Length of Curve is greater than OSD or ISD evaluator uses Length of Parabolic Summit Curve = (Deviation Angle*(Stopping Sight Distance^2))/(8*Height of Eye Level of Driver above Roadway) to evaluate the Length of Parabolic Summit Curve, The Length of Summit Curve when Length of Curve is greater than OSD or ISD is defined as ratio of product of stopping sight distance and deviation angle to the height of eye level of driver above roadway. Length of Parabolic Summit Curve is denoted by LSc symbol.

How to evaluate Length of Summit Curve when Length of Curve is greater than OSD or ISD using this online evaluator? To use this online evaluator for Length of Summit Curve when Length of Curve is greater than OSD or ISD, enter Deviation Angle (N), Stopping Sight Distance (SSD) & Height of Eye Level of Driver above Roadway (H) and hit the calculate button.

FAQs on Length of Summit Curve when Length of Curve is greater than OSD or ISD

What is the formula to find Length of Summit Curve when Length of Curve is greater than OSD or ISD?
The formula of Length of Summit Curve when Length of Curve is greater than OSD or ISD is expressed as Length of Parabolic Summit Curve = (Deviation Angle*(Stopping Sight Distance^2))/(8*Height of Eye Level of Driver above Roadway). Here is an example- 213.3333 = (0.08*(160^2))/(8*1.2).
How to calculate Length of Summit Curve when Length of Curve is greater than OSD or ISD?
With Deviation Angle (N), Stopping Sight Distance (SSD) & Height of Eye Level of Driver above Roadway (H) we can find Length of Summit Curve when Length of Curve is greater than OSD or ISD using the formula - Length of Parabolic Summit Curve = (Deviation Angle*(Stopping Sight Distance^2))/(8*Height of Eye Level of Driver above Roadway).
What are the other ways to Calculate Length of Parabolic Summit Curve?
Here are the different ways to Calculate Length of Parabolic Summit Curve-
  • Length of Parabolic Summit Curve=2*Stopping Sight Distance-(((2*Height of Eye Level of Driver above Roadway)^0.5+(2*Height of Subject above Pavement Surface)^0.5)^2/Deviation Angle)OpenImg
  • Length of Parabolic Summit Curve=(Deviation Angle*Stopping Sight Distance^2)/((2*Height of Eye Level of Driver above Roadway)^0.5+(2*Height of Subject above Pavement Surface)^0.5)^2OpenImg
  • Length of Parabolic Summit Curve=2*Stopping Sight Distance-((8*Height of Eye Level of Driver above Roadway)/Deviation Angle)OpenImg
Can the Length of Summit Curve when Length of Curve is greater than OSD or ISD be negative?
No, the Length of Summit Curve when Length of Curve is greater than OSD or ISD, measured in Length cannot be negative.
Which unit is used to measure Length of Summit Curve when Length of Curve is greater than OSD or ISD?
Length of Summit Curve when Length of Curve is greater than OSD or ISD is usually measured using the Meter[m] for Length. Millimeter[m], Kilometer[m], Decimeter[m] are the few other units in which Length of Summit Curve when Length of Curve is greater than OSD or ISD can be measured.
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