CHAPTER $6,$ part $2-$ Problem $2$:

The Mack Trucks plant in Salem is planning an expansion for their factory off US$-460($Main St$).$ In the vicinity of the plant, Main St consists of a divided highway with two $12-$ft lanes in each direction, a positive barrier between directions, a $5-$ft shoulder on the right and a $1-$foot shoulder on the left through rolling terrain with three access points per mile. The speed limit is $55m\frac{i}{h}r$ and this segment has a directional peak$-$hour volume of $2200ve\frac{h}{h}r$ with a peak$-$hour factor of $0\mathrm{.}85.$ The current traffic stream is made up of $7\%$ single$-$unit trucks and $7\%$ tractor$-$trailer trucks. What is the current level of service $($LOS$)$ for Main St near the plant?