$2)$ A four$-$lane multilane highway $($two lanes in each direction separated by a TWLTL $(\backslash (\backslash$mathrm$\{$C$\}\_\{\backslash$mathrm$\{$L$\}\}=6\backslash$mathrm$\{$ft$\}\backslash )))$ is considered. One upgrade is $\backslash (2\mathrm{.}5\backslash \%\backslash )$ and is $1\mathrm{.}5$ mile long. The peak$-$hour volume is $2000$ vehicles with the peak$-$hour factor of $0\mathrm{.}95.$ There are $200$ heavy vehicles on the highway during the peak hour $(\backslash (50\backslash \%\backslash )$ SUT and $\backslash (50\backslash \%\backslash$mathrm$\{$TT$\}\backslash )).$ The posted speed limit is $50$ mph $.$ The highway has $\backslash (12-\backslash$mathrm$\{$ft$\}\backslash )$ lanes, $\backslash (4-\backslash$mathrm$\{$ft$\}\backslash )$ right shoulder, and $20$ access points per mile. What is the level of service? $(8$ pts$.)$