Setback Distance in Transportation System Formulas

Setback 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. And is denoted by m. Setback Distance is usually measured using the Meter for Length. Note that the value of Setback Distance is always positive.

Formulas to find Setback Distance in Transportation System

fxSetback Distance where Ls is Smaller than LcGo

fxSetback Distance for Single Lane Road where Ls is greater than LcGo

fxSetback Distance for Multi Lane Road where Ls is greater than LcGo

List of variables in Transportation System formulas

fx Radius for Transition Curve Go

fx Angle subtended by Radius of Curve for Single Lane Go

fx Sight Distance Go

fx Length of Transition Curve Go

fx Center Distance between Road and Inner Lane Go

FAQ

What is the Setback Distance?

Setback 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. Setback Distance is usually measured using the Meter for Length. Note that the value of Setback Distance is always positive.

Can the Setback Distance be negative?

No, the Setback Distance, measured in Length cannot be negative.

What unit is used to measure Setback Distance?

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

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