Sight Distance when Length of Curve is Less Calculator

✖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%
✖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%
✖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 Length of Curve is Less [SD]

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Sight Distance when Length of Curve is Less Solution

STEP 0: Pre-Calculation Summary

Formula Used

Sight Distance SSD = 0.5*Length of Curve+(100*(sqrt(Height of Observer)+sqrt(Height of Object))^2)/((Upgrade)-(Downgrade))
SD = 0.5*L_c+(100*(sqrt(H)+sqrt(h₂))^2)/((g₁)-(g₂))
This formula uses 1 Functions, 6 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.
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.
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.
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

Length of Curve: 616 Meter --> 616 Meter 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
Upgrade: 2.2 --> No Conversion Required
Downgrade: -1.5 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

SD = 0.5*L_c+(100*(sqrt(H)+sqrt(h₂))^2)/((g₁)-(g₂)) --> 0.5*616+(100*(sqrt(1.2)+sqrt(2))^2)/((2.2)-((-1.5)))

Evaluating ... ...

SD = 478.226666945025

STEP 3: Convert Result to Output's Unit

478.226666945025 Meter --> No Conversion Required

FINAL ANSWER

478.226666945025 ≈ 478.2267 Meter <-- Sight Distance SSD

(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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Meerut Institute of Engineering and Technology (MIET), Meerut

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< Surveying Vertical Curves Calculators

Length of Curve Based on Centrifugal Ratio

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

Permissible Grade given Length

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

Change of Grade given Length

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

Length of Vertical Curve

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

Sight Distance when Length of Curve is Less Formula

LaTeX Go

Sight Distance SSD = 0.5*Length of Curve+(100*(sqrt(Height of Observer)+sqrt(Height of Object))^2)/((Upgrade)-(Downgrade))
SD = 0.5*L_c+(100*(sqrt(H)+sqrt(h₂))^2)/((g₁)-(g₂))

What are the consequences of poorly designed Vertical Curves?

Poorly designed vertical curves can lead to accidents, loss of control of vehicles, and increased wear and tear on vehicles and roadways, as well as decreased safety for pedestrians and cyclists.

How to Calculate Sight Distance when Length of Curve is Less?

Sight Distance when Length of Curve is Less calculator uses Sight Distance SSD = 0.5*Length of Curve+(100*(sqrt(Height of Observer)+sqrt(Height of Object))^2)/((Upgrade)-(Downgrade)) to calculate the Sight Distance SSD, The Sight Distance when Length of Curve is Less is defined as a condition where the difference between two vehicles or sight distance is large compared to the length of vertical curve. Sight Distance SSD is denoted by SD symbol.

How to calculate Sight Distance when Length of Curve is Less using this online calculator? To use this online calculator for Sight Distance when Length of Curve is Less, enter Length of Curve (L_c), Height of Observer (H), Height of Object (h₂), Upgrade (g₁) & Downgrade (g₂) and hit the calculate button. Here is how the Sight Distance when Length of Curve is Less calculation can be explained with given input values -> 478.2267 = 0.5*616+(100*(sqrt(1.2)+sqrt(2))^2)/((2.2)-((-1.5))).

FAQ

What is Sight Distance when Length of Curve is Less?

The Sight Distance when Length of Curve is Less is defined as a condition where the difference between two vehicles or sight distance is large compared to the length of vertical curve and is represented as SD = 0.5*L_c+(100*(sqrt(H)+sqrt(h₂))^2)/((g₁)-(g₂)) or Sight Distance SSD = 0.5*Length of Curve+(100*(sqrt(Height of Observer)+sqrt(Height of Object))^2)/((Upgrade)-(Downgrade)). Length of Curve is determined by the permissible rate of change of grade or from centrifugal consideration as appropriate, 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, 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 Length of Curve is Less?

The Sight Distance when Length of Curve is Less is defined as a condition where the difference between two vehicles or sight distance is large compared to the length of vertical curve is calculated using Sight Distance SSD = 0.5*Length of Curve+(100*(sqrt(Height of Observer)+sqrt(Height of Object))^2)/((Upgrade)-(Downgrade)). To calculate Sight Distance when Length of Curve is Less, you need Length of Curve (L_c), Height of Observer (H), Height of Object (h₂), Upgrade (g₁) & Downgrade (g₂). With our tool, you need to enter the respective value for Length of Curve, Height of Observer, Height of Object, 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 Length of Curve, Height of Observer, Height of Object, Upgrade & Downgrade. We can use 2 other way(s) to calculate the same, which is/are as follows -

Sight Distance SSD = (Length of Curve/2)+(400*Height of Vertical Curves/((Upgrade)-(Downgrade)))
Sight Distance SSD = sqrt((800*Height of Vertical Curves*Length of Curve)/((Upgrade)-(Downgrade)))

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