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Extra Widening on Horizontal Curves

The psycholog...

Question

The psychological extra widening to be provided for a curve having a radius of 260 m and a design speed of 80 kmph is _______m.

A

1.44 m

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B

0.145 m

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C

0.29 m

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D

0.522 m

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Solution

The correct option is D 0.522 m
Psychological extra widening is given by

$W_{p} = \frac{V}{9.5 \times \sqrt{R}}$

$= \frac{80}{9.5 \times \sqrt{260}}$

$= 0.522 m$

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