Answer

Problem $1(30$ points$)$

A westbound section of freeway currently has three $12-$ft wide lanes, a $6-$ft right shoulder, and no ramps within $3$ miles upstream and downstream of the segment midpoint. It is on rolling terrain with $10\%$ heavy vehicles $($Trucks and Buses$)$ and is operating at capacity $($familiar users$)$ with a peak$-$hour factor of $0\mathrm{.}9.$ If the road is expanded to four $11-$foot lanes with a $2-$foot right shoulder, and traffic after the expansion is projected to increase by $10\%$ with the same heavy vehicle percentage and peak$-$hour factor, what is the new LOS?