CLOS#$2$: Solve traffic engineering and planning problems $($ABET#$1,$ Skills$)$

Q$\mathrm{.}1$: Intersection Design: Case F$-$Left Turns from the Maior Road

A two$-$lane minor road intersects $($speed limit $50kph)$ with a $4-$lane divided major road with a speed limit of $90kph.$ The intersection is controlled by a permitted left$-$turn signal from the major road onto the minor road. Determine the sufficient sight distance for the left$-$turning drivers to decide when to turn left across the lane$($s$)$ used by opposing traffic $($case $F).$ The following conditions exist at the intersection:

Major road lane width $=3\mathrm{.}6m,$ median width $=3\mathrm{.}0m,$ Design vehicle on the minor road is a passenger car whose length is $6\mathrm{.}6m,$ and approach grade on the minor road is $+4\%.[10$ Marks$]$