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Stopping Sight Distance Formula

GoStopping Sight Distance given Intermediate Sight Distance Formula

GoStopping Sight Distance for Velocity in meter per second Formula

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Stopping Sight Distance is defined as distance provided on the road before a sharp turn. Check FAQs

SSD = BD + LD

SSD - Stopping Sight Distance?BD - Breaking Distance?LD - Lag Distance?

Stopping Sight Distance Example

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Here is how the Stopping Sight Distance equation looks like with Values.

Here is how the Stopping Sight Distance equation looks like with Units.

Here is how the Stopping Sight Distance equation looks like.

67.7 = 40 + 27.7

67.7m = 40m + 27.7m

67.7 = 40 + 27.7

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Stopping Sight Distance Solution

Follow our step by step solution on how to calculate Stopping Sight Distance?

FIRST Step Consider the formula

SSD = BD + LD

Next Step Substitute values of Variables

∴

SSD = 40m + 27.7m

Next Step Prepare to Evaluate

∴

SSD = 40 + 27.7

LAST Step Evaluate

∴

SSD = 67.7m

Stopping Sight Distance Formula Elements

Variables

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

Breaking Distance

Breaking distance is defined as the distance traveled after applying brake till the vehicle stops.

Symbol: BD

Measurement: LengthUnit: m

Note: Value should be greater than 0.

Formulas to find Breaking Distance

Lag Distance

Lag distance is defined as the distance travelled by the vehicle before applying the break and after seeing the object.

Symbol: LD

Measurement: LengthUnit: m

Note: Value should be greater than 0.

Formulas to find Lag Distance

Other Formulas to find Stopping Sight Distance

Go Stopping Sight Distance given Intermediate Sight Distance

SSD = \frac{ISD}{2}

Go Stopping Sight Distance for Velocity in meter per second

SSD = V b \cdot t + \frac{{V b}^{2}}{2 \cdot [g] \cdot f}

Go Stopping Sight Distance on Upward Inclined Surface

SSD = V b \cdot t + \frac{{V b}^{2}}{2 \cdot [g] \cdot f + ΔH}

Go Stopping Sight Distance on Level Ground with Breaking Efficiency

SSD = V b \cdot t + \frac{{V b}^{2}}{2 \cdot [g] \cdot f \cdot η x}

Other formulas in SSD category

Go Intermediate Sight Distance

ISD = 2 \cdot SSD

Go Total Reaction Time given Stopping Sight Distance

t = \frac{SSD - \frac{{V b}^{2}}{2 \cdot [g] \cdot f}}{V b}

How to Evaluate Stopping Sight Distance?

Stopping Sight Distance evaluator uses Stopping Sight Distance = Breaking Distance+Lag Distance to evaluate the Stopping Sight Distance, The Stopping Sight Distance formula is defined as the minimum sight distance available on a highway at any spot having sufficient length to enable the driver to stop a vehicle traveling at design speed, safely without collision with any other obstruction. Stopping Sight Distance is denoted by SSD symbol.

How to evaluate Stopping Sight Distance using this online evaluator? To use this online evaluator for Stopping Sight Distance, enter Breaking Distance (BD) & Lag Distance (LD) and hit the calculate button.

FAQs on Stopping Sight Distance

What is the formula to find Stopping Sight Distance?

The formula of Stopping Sight Distance is expressed as Stopping Sight Distance = Breaking Distance+Lag Distance. Here is an example- 67.7 = 40+27.7.

How to calculate Stopping Sight Distance?

With Breaking Distance (BD) & Lag Distance (LD) we can find Stopping Sight Distance using the formula - Stopping Sight Distance = Breaking Distance+Lag Distance.

What are the other ways to Calculate Stopping Sight Distance?

Here are the different ways to Calculate Stopping Sight Distance-

Stopping Sight Distance=Intermediate Sight Distance/2
Stopping Sight Distance=Speed of Slow moving vehicle*Break Reaction Time+(Speed of Slow moving vehicle^2)/(2*[g]*Design Coefficient of Friction)
Stopping Sight Distance=Speed of Slow moving vehicle*Break Reaction Time+(Speed of Slow moving vehicle^2)/(2*[g]*Design Coefficient of Friction+Difference in Elevation)

Can the Stopping Sight Distance be negative?

No, the Stopping Sight Distance, measured in Length cannot be negative.

Which unit is used to measure Stopping Sight Distance?

Stopping Sight Distance is usually measured using the Meter[m] for Length. Millimeter[m], Kilometer[m], Decimeter[m] are the few other units in which Stopping Sight Distance can be measured.

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Stopping Sight Distance Formula

​GoStopping Sight Distance given Intermediate Sight Distance Formula

​GoStopping Sight Distance for Velocity in meter per second Formula

Stopping Sight Distance Example

Stopping Sight Distance Solution

Stopping Sight Distance Formula Elements

Other Formulas to find Stopping Sight Distance

Other formulas in SSD category

How to Evaluate Stopping Sight Distance?

FAQs on Stopping Sight Distance

Variable Name

GoStopping Sight Distance given Intermediate Sight Distance Formula

GoStopping Sight Distance for Velocity in meter per second Formula