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Set Back Distance by Approx Method (L is less than S) Formula

GoSet Back Distance by Approx Method (L is greater than S) Formula

GoSet Back Distance by Rational Method (L is greater than S) Single Lane Formula

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Set back distance is the distance required from the centerline of a horizontal curve to an obstruction on the inner side of the curve to provide adequate sight distance at a horizontal curve. Check FAQs

m = \frac{L c \cdot (2 \cdot SSD - L c)}{8 \cdot R t}

m - Set Back Distance?L_c - Length of Curve?SSD - Stopping Sight Distance?R_t - Radius of Curve?

Set Back Distance by Approx Method (L is less than S) Example

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Here is how the Set Back Distance by Approx Method (L is less than S) equation looks like with Values.

Here is how the Set Back Distance by Approx Method (L is less than S) equation looks like with Units.

Here is how the Set Back Distance by Approx Method (L is less than S) equation looks like.

10.5 = \frac{140 \cdot (2 \cdot 160 - 140)}{8 \cdot 300}

10.5m = \frac{140m \cdot (2 \cdot 160m - 140m)}{8 \cdot 300m}

10.5 = \frac{140 \cdot (2 \cdot 160 - 140)}{8 \cdot 300}

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Set Back Distance by Approx Method (L is less than S) Solution

Follow our step by step solution on how to calculate Set Back Distance by Approx Method (L is less than S)?

FIRST Step Consider the formula

m = \frac{L c \cdot (2 \cdot SSD - L c)}{8 \cdot R t}

Next Step Substitute values of Variables

∴

m = \frac{140m \cdot (2 \cdot 160m - 140m)}{8 \cdot 300m}

Next Step Prepare to Evaluate

∴

m = \frac{140 \cdot (2 \cdot 160 - 140)}{8 \cdot 300}

LAST Step Evaluate

∴

m = 10.5m

Set Back Distance by Approx Method (L is less than S) Formula Elements

Variables

Set Back Distance

Set back distance is the distance required from the centerline of a horizontal curve to an obstruction on the inner side of the curve to provide adequate sight distance at a horizontal curve.

Symbol: m

Measurement: LengthUnit: m

Note: Value should be greater than 0.

Formulas to find Set Back Distance

Length of Curve

Length of curve is defined as the arc length in a parabolic curves.

Symbol: L_c

Measurement: LengthUnit: m

Note: Value should be greater than 0.

Formulas to find Length of Curve

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.

Formulas to find Stopping Sight Distance

Radius of Curve

The Radius of Curve is defined as the horizontal curve with a specific radius which quantifies smoothness and ease of vehicle movement through a curve.

Symbol: R_t

Measurement: LengthUnit: m

Note: Value should be greater than 0.

Formulas to find Radius of Curve

Other Formulas to find Set Back Distance

Go Set Back Distance by Approx Method (L is greater than S)

m = \frac{{SSD}^{2}}{8 \cdot R t}

Go Set Back Distance by Rational Method (L is greater than S) Single Lane

m = R t - R t \cdot \cos (\frac{SSD}{2 \cdot R t})

How to Evaluate Set Back Distance by Approx Method (L is less than S)?

Set Back Distance by Approx Method (L is less than S) evaluator uses Set Back Distance = (Length of Curve*(2*Stopping Sight Distance-Length of Curve))/(8*Radius of Curve) to evaluate the Set Back Distance, Set Back Distance by Approx Method (L is less than S) is defined as the distance required from the centerline of a horizontal curve to an obstruction on the inner side of the curve to provide adequate sight distance at a horizontal curve when the length of the curve is less than sight distance. Set Back Distance is denoted by m symbol.

How to evaluate Set Back Distance by Approx Method (L is less than S) using this online evaluator? To use this online evaluator for Set Back Distance by Approx Method (L is less than S), enter Length of Curve (L_c), Stopping Sight Distance (SSD) & Radius of Curve (R_t) and hit the calculate button.

FAQs on Set Back Distance by Approx Method (L is less than S)

What is the formula to find Set Back Distance by Approx Method (L is less than S)?

The formula of Set Back Distance by Approx Method (L is less than S) is expressed as Set Back Distance = (Length of Curve*(2*Stopping Sight Distance-Length of Curve))/(8*Radius of Curve). Here is an example- 10.5 = (140*(2*160-140))/(8*300).

How to calculate Set Back Distance by Approx Method (L is less than S)?

With Length of Curve (L_c), Stopping Sight Distance (SSD) & Radius of Curve (R_t) we can find Set Back Distance by Approx Method (L is less than S) using the formula - Set Back Distance = (Length of Curve*(2*Stopping Sight Distance-Length of Curve))/(8*Radius of Curve).

What are the other ways to Calculate Set Back Distance?

Here are the different ways to Calculate Set Back Distance-

Set Back Distance=Stopping Sight Distance^2/(8*Radius of Curve)
Set Back Distance=Radius of Curve-Radius of Curve*cos((Stopping Sight Distance)/(2*Radius of Curve))

Can the Set Back Distance by Approx Method (L is less than S) be negative?

No, the Set Back Distance by Approx Method (L is less than S), measured in Length cannot be negative.

Which unit is used to measure Set Back Distance by Approx Method (L is less than S)?

Set Back Distance by Approx Method (L is less than S) is usually measured using the Meter[m] for Length. Millimeter[m], Kilometer[m], Decimeter[m] are the few other units in which Set Back Distance by Approx Method (L is less than S) can be measured.

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Set Back Distance by Approx Method (L is less than S) Formula

​GoSet Back Distance by Approx Method (L is greater than S) Formula

​GoSet Back Distance by Rational Method (L is greater than S) Single Lane Formula

Set Back Distance by Approx Method (L is less than S) Example

Set Back Distance by Approx Method (L is less than S) Solution

Set Back Distance by Approx Method (L is less than S) Formula Elements

Other Formulas to find Set Back Distance

How to Evaluate Set Back Distance by Approx Method (L is less than S)?

FAQs on Set Back Distance by Approx Method (L is less than S)

Variable Name

GoSet Back Distance by Approx Method (L is greater than S) Formula

GoSet Back Distance by Rational Method (L is greater than S) Single Lane Formula