Q$.1(10$ points$)$

A horizontal curve with $=30$ and a radius of $1,400ft$ is designed for a $2-$lane highway. If the

design speed is $60mph$ and PI station is $150+30,$ determine the following assuming standard

lane width:

$($a$)$ Chord Distance

$($b$)$ Station of the begin and end points of the curve

$($c$)$ Is the existing friction sufficient for a superelevation rate of $6\%?$