$14-3.$ A Class I rural two$-$lane highway segment contains a significant grade of $4\%,2$ miles in length. The base free$-$flow speed $($BFFS$)$ of the facility is $55m\frac{i}{h},$ and the cross$-$section is $11-ft$ lanes with $2-ft$ clear shoulders on both sides. There are $5ac-$ cess points per mile along the segment, and $80\%$ of the segment consists of $"$no$-$passing" zones. Current traffic on the facility is $250ve\frac{h}{h},$ including $20\%$ trucks and $10\%$ RVs$.$ Directional distribution is $\frac{70}{30}(70\%$ traveling upgrade$),$ and the PHF is $0\mathrm{.}88.$ What level of service is expected on the upgrade and downgrade of this segment?