A six$-$lane multi$-$lane highway $($three lanes in each direction$)$ currently operates at maximum LOS $"$D$"$ conditions. The measured FFS is $50$ mi$/$h$.$ The highway is on level terrain with $21\%$ SUTs and $6\%$ TTs$,$ and the peak$-$hour factor is $0\mathrm{.}86.$ If $15\mathrm{.}6\%$ of all directional traffic occurs during the peak hour, determine the average directional daily traffic volume.