Sight Distance when S is Less than L Calculator

✖Tangential Correction is the elevation difference between the curve and the tangent to it.ⓘ Tangential Correction [c]			+10% -10%
✖Height of Observer is the length or vertical length of the observer.ⓘ Height of Observer [H]			+10% -10%
✖Height of Object is the vertical distance of the object which is being observed.ⓘ Height of Object [h₂]			+10% -10%

✖Sight Distance is s the minimum distance between two vehicles moving along a curve, when the driver of one vehicle can just see the other vehicle on the road.ⓘ Sight Distance when S is Less than L [S]

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Sight Distance when S is Less than L

Formula

`"S" = (1/"c")*(sqrt("H")+sqrt("h"_{"2"}))`

Example

`"5.019317m"=(1/"0.5")*(sqrt("1.2m")+sqrt("2m"))`

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Sight Distance when S is Less than L Solution

STEP 0: Pre-Calculation Summary

Formula Used

Sight Distance = (1/Tangential Correction)*(sqrt(Height of Observer)+sqrt(Height of Object))
S = (1/c)*(sqrt(H)+sqrt(h₂))
This formula uses 1 Functions, 4 Variables

Functions Used

sqrt - A square root function is a function that takes a non-negative number as an input and returns the square root of the given input number., sqrt(Number)

Variables Used

Sight Distance - (Measured in Meter) - Sight Distance is s the minimum distance between two vehicles moving along a curve, when the driver of one vehicle can just see the other vehicle on the road.
Tangential Correction - Tangential Correction is the elevation difference between the curve and the tangent to it.
Height of Observer - (Measured in Meter) - Height of Observer is the length or vertical length of the observer.
Height of Object - (Measured in Meter) - Height of Object is the vertical distance of the object which is being observed.

STEP 1: Convert Input(s) to Base Unit

Tangential Correction: 0.5 --> No Conversion Required
Height of Observer: 1.2 Meter --> 1.2 Meter No Conversion Required
Height of Object: 2 Meter --> 2 Meter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

S = (1/c)*(sqrt(H)+sqrt(h₂)) --> (1/0.5)*(sqrt(1.2)+sqrt(2))

Evaluating ... ...

S = 5.01931735476686

STEP 3: Convert Result to Output's Unit

5.01931735476686 Meter --> No Conversion Required

FINAL ANSWER

5.01931735476686 ≈ 5.019317 Meter <-- Sight Distance

(Calculation completed in 00.004 seconds)

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Created by Chandana P Dev

NSS College of Engineering (NSSCE), Palakkad

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Verified by Ishita Goyal

Meerut Institute of Engineering and Technology (MIET), Meerut

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< 19 Surveying Vertical Curves Calculators

Sight Distance when Length of Curve is Less

Go Sight Distance SSD = 0.5*Length of Curve+(100*(sqrt(Height of Observer)+sqrt(Height of Object))^2)/((Upgrade)-(Downgrade))

Length of Curve when Sight Distance is More

Go Length of Curve = 2*Sight Distance SSD-(200*(sqrt(Height of Observer)+sqrt(Height of Object))^2)/((Upgrade)-(Downgrade))

Length of Curve when S is Less than L

Go Length of Curve = Sight Distance SSD^2*((Upgrade)-(Downgrade))/(200*(sqrt(Height of Observer)+sqrt(Height of Object))^2)

Velocity given Length

Go Vehicle Velocity = sqrt((Length of Curve*100*Allowable Centrifugal Acceleration)/(Upgrade-(Downgrade)))

Sight Distance when S is Less than L and h1 and h2 are same

Go Sight Distance SSD = sqrt((800*Height of Vertical Curves*Length of Curve)/((Upgrade)-(Downgrade)))

Sight Distance when S is Less than L

Go Sight Distance = (1/Tangential Correction)*(sqrt(Height of Observer)+sqrt(Height of Object))

Allowable Centrifugal Acceleration given Length

Go Allowable Centrifugal Acceleration = ((Upgrade)-(Downgrade))*Vehicle Velocity^2/(100*Length of Curve)

Length of Curve Based on Centrifugal Ratio

Go Length of Curve = ((Upgrade)-(Downgrade))*Vehicle Velocity^2/(100*Allowable Centrifugal Acceleration)

Upgrade given Length based on Centrifugal Ratio

Go Upgrade = (Length of Curve*100*Allowable Centrifugal Acceleration/Vehicle Velocity^2)+(Downgrade)

Sight Distance when Length of Curve is Less and Both Height of Observer and Object is Same

Go Sight Distance SSD = (Length of Curve/2)+(400*Height of Vertical Curves/((Upgrade)-(Downgrade)))

Downgrade given Length based on Centrifugal Ratio

Go Downgrade = Upgrade-(Length of Curve*100*Allowable Centrifugal Acceleration/Vehicle Velocity^2)

Length of Curve when S is Less than L and h1 and h2 are same

Go Length of Curve = ((Upgrade)-(Downgrade))*Sight Distance SSD^2/(800*Height of Vertical Curves)

Length of Curve when Height of Observer and Object are Same

Go Length of Curve = 2*Sight Distance SSD-(800*Height of Vertical Curves/((Upgrade)-(Downgrade)))

Length of Curve given Change in Grade where S is more than L

Go Length of Curve = 2*Sight Distance SSD-(800*Height of Vertical Curves/Change in Grade)

Length given S is Less than L and Change of Grade

Go Length of Curve = Change in Grade*Sight Distance SSD^2/(800*Height of Vertical Curves)

Tangential Correction

Go Tangential Correction = (Upgrade-Downgrade)/4*Number of Chords

Permissible Grade given Length

Go Permissible Rate = Change in Grade/Length of Vertical Curve

Change of Grade given Length

Go Change in Grade = Length of Vertical Curve*Permissible Rate

Length of Vertical Curve

Go Length of Vertical Curve = Change in Grade/Permissible Rate

Sight Distance when S is Less than L Formula

Sight Distance = (1/Tangential Correction)*(sqrt(Height of Observer)+sqrt(Height of Object))
S = (1/c)*(sqrt(H)+sqrt(h₂))

What is a Summit Curve?

A summit curve is a type of vertical curve that is used to transition from a downward slope to an upward slope.

How to Calculate Sight Distance when S is Less than L?

Sight Distance when S is Less than L calculator uses Sight Distance = (1/Tangential Correction)*(sqrt(Height of Observer)+sqrt(Height of Object)) to calculate the Sight Distance, The Sight Distance when S is Less than L is defined for a situation where the stopping sight distance or simply sight distance is less than the length of vertical curve or valley. Sight Distance is denoted by S symbol.

How to calculate Sight Distance when S is Less than L using this online calculator? To use this online calculator for Sight Distance when S is Less than L, enter Tangential Correction (c), Height of Observer (H) & Height of Object (h₂) and hit the calculate button. Here is how the Sight Distance when S is Less than L calculation can be explained with given input values -> 5.019317 = (1/0.5)*(sqrt(1.2)+sqrt(2)).

FAQ

What is Sight Distance when S is Less than L?

The Sight Distance when S is Less than L is defined for a situation where the stopping sight distance or simply sight distance is less than the length of vertical curve or valley and is represented as S = (1/c)*(sqrt(H)+sqrt(h₂)) or Sight Distance = (1/Tangential Correction)*(sqrt(Height of Observer)+sqrt(Height of Object)). Tangential Correction is the elevation difference between the curve and the tangent to it, Height of Observer is the length or vertical length of the observer & Height of Object is the vertical distance of the object which is being observed.

How to calculate Sight Distance when S is Less than L?

The Sight Distance when S is Less than L is defined for a situation where the stopping sight distance or simply sight distance is less than the length of vertical curve or valley is calculated using Sight Distance = (1/Tangential Correction)*(sqrt(Height of Observer)+sqrt(Height of Object)). To calculate Sight Distance when S is Less than L, you need Tangential Correction (c), Height of Observer (H) & Height of Object (h₂). With our tool, you need to enter the respective value for Tangential Correction, Height of Observer & Height of Object and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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