Question

The ruling minimum radius of the horizontal curve of a national highway in plain terrain for a ruling design speed of $100km/hour$ with $e=0.07$ and $f=0.15$ is close to

• A. $36m$
• B. $300m$
• C. $360m$
• D. $250m$

Answer 1

The correct option is C $360m$

$e+f=\frac{V^2}{127R}$
$\Rightarrow R=\frac{(100{)}^2}{127\times (0.07+0.15)}$
$\Rightarrow R=358m=360m$