A $4-$lane freeway $(2$ lanes in each direction$)$ through a mountainous region $($rolling terrain$)$ has $11-$foot lanes, with $6-$feet of clearance on the right side. There are $2$ ramps within $3$ miles Lapstream and $3$ ramps within $3$ miles downstream of the segment midpoint. The traffic stream is currently only passenger cars. The peak hour factor is $0\mathrm{.}90,$ with a peak hour volume of $2350$ velicles. What is the level of service $($LOS$)$ for this freeway segment?