Q$2.$

A horizontal curve on a two$-$lane road in Niagara region has the following

characteristics:

$,$ Radius $=360m$

Design Speed $=80k\frac{m}{h}$

Station of the $PC=10+20$

Station of the PT $=12+00$

No transition curve

A noise barrier is to be constructed along the inside of the curve. Calculate the

minimum distance from the barrier to the centre of the inside lane to provide:

$($a$)$ Safe stopping sight distance

$($b$)$ Safe passing sight distance