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

✖Height of Vertical Curves is the distance between the lowest and highest points of a person standing upright.ⓘ Height of Vertical Curves [h]			+10% -10%
✖Length of Curve is determined by the permissible rate of change of grade or from centrifugal consideration as appropriate.ⓘ Length of Curve [L_c]			+10% -10%
✖Upgrade is the gradient or the slope which is towards the crest of a curve. Mentioned by %.ⓘ Upgrade [g₁]			+10% -10%
✖Downgrade is the gradient or the slope which is guided to the downward direction of a curve. Mentioned by %.ⓘ Downgrade [g₂]			+10% -10%

✖Sight Distance SSD 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 and h1 and h2 are same [SD]

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Formula

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

Formula

`"SD" = sqrt((800*"h"*"L"_{"c"})/(("g"_{"1"})-("g"_{"2"})))`

Example

`"475.8378m"=sqrt((800*"1.7m"*"616m")/(("2.2")-("-1.5")))`

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

STEP 0: Pre-Calculation Summary

Formula Used

Sight Distance SSD = sqrt((800*Height of Vertical Curves*Length of Curve)/((Upgrade)-(Downgrade)))
SD = sqrt((800*h*L_c)/((g₁)-(g₂)))
This formula uses 1 Functions, 5 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 SSD - (Measured in Meter) - Sight Distance SSD 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.
Height of Vertical Curves - (Measured in Meter) - Height of Vertical Curves is the distance between the lowest and highest points of a person standing upright.
Length of Curve - (Measured in Meter) - Length of Curve is determined by the permissible rate of change of grade or from centrifugal consideration as appropriate.
Upgrade - Upgrade is the gradient or the slope which is towards the crest of a curve. Mentioned by %.
Downgrade - Downgrade is the gradient or the slope which is guided to the downward direction of a curve. Mentioned by %.

STEP 1: Convert Input(s) to Base Unit

Height of Vertical Curves: 1.7 Meter --> 1.7 Meter No Conversion Required
Length of Curve: 616 Meter --> 616 Meter No Conversion Required
Upgrade: 2.2 --> No Conversion Required
Downgrade: -1.5 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

SD = sqrt((800*h*L_c)/((g₁)-(g₂))) --> sqrt((800*1.7*616)/((2.2)-((-1.5))))

Evaluating ... ...

SD = 475.837810205979

STEP 3: Convert Result to Output's Unit

475.837810205979 Meter --> No Conversion Required

FINAL ANSWER

475.837810205979 ≈ 475.8378 Meter <-- Sight Distance SSD

(Calculation completed in 00.004 seconds)

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NSS College of Engineering (NSSCE), Palakkad

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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 and h1 and h2 are same Formula

Sight Distance SSD = sqrt((800*Height of Vertical Curves*Length of Curve)/((Upgrade)-(Downgrade)))
SD = sqrt((800*h*L_c)/((g₁)-(g₂)))

What is a Sag Curve?

A sag curve is a type of vertical curve that is used to transition from a downward slope to a level or upward slope.

How to Calculate Sight Distance when S is Less than L and h1 and h2 are same?

Sight Distance when S is Less than L and h1 and h2 are same calculator uses Sight Distance SSD = sqrt((800*Height of Vertical Curves*Length of Curve)/((Upgrade)-(Downgrade))) to calculate the Sight Distance SSD, The Sight Distance when S is Less than L and h1 and h2 are same is defined for a situation where both the height of vehicles are same. Sight Distance SSD is denoted by SD symbol.

How to calculate Sight Distance when S is Less than L and h1 and h2 are same using this online calculator? To use this online calculator for Sight Distance when S is Less than L and h1 and h2 are same, enter Height of Vertical Curves (h), Length of Curve (L_c), Upgrade (g₁) & Downgrade (g₂) and hit the calculate button. Here is how the Sight Distance when S is Less than L and h1 and h2 are same calculation can be explained with given input values -> 475.8378 = sqrt((800*1.7*616)/((2.2)-((-1.5)))).

FAQ

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

The Sight Distance when S is Less than L and h1 and h2 are same is defined for a situation where both the height of vehicles are same and is represented as SD = sqrt((800*h*L_c)/((g₁)-(g₂))) or Sight Distance SSD = sqrt((800*Height of Vertical Curves*Length of Curve)/((Upgrade)-(Downgrade))). Height of Vertical Curves is the distance between the lowest and highest points of a person standing upright, Length of Curve is determined by the permissible rate of change of grade or from centrifugal consideration as appropriate, Upgrade is the gradient or the slope which is towards the crest of a curve. Mentioned by % & Downgrade is the gradient or the slope which is guided to the downward direction of a curve. Mentioned by %.

How to calculate Sight Distance when S is Less than L and h1 and h2 are same?

The Sight Distance when S is Less than L and h1 and h2 are same is defined for a situation where both the height of vehicles are same is calculated using Sight Distance SSD = sqrt((800*Height of Vertical Curves*Length of Curve)/((Upgrade)-(Downgrade))). To calculate Sight Distance when S is Less than L and h1 and h2 are same, you need Height of Vertical Curves (h), Length of Curve (L_c), Upgrade (g₁) & Downgrade (g₂). With our tool, you need to enter the respective value for Height of Vertical Curves, Length of Curve, Upgrade & Downgrade and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Sight Distance SSD?

In this formula, Sight Distance SSD uses Height of Vertical Curves, Length of Curve, Upgrade & Downgrade. We can use 2 other way(s) to calculate the same, which is/are as follows -

Sight Distance SSD = 0.5*Length of Curve+(100*(sqrt(Height of Observer)+sqrt(Height of Object))^2)/((Upgrade)-(Downgrade))
Sight Distance SSD = (Length of Curve/2)+(400*Height of Vertical Curves/((Upgrade)-(Downgrade)))

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