Question $11\mathrm{.}1$ why road geometric design is three dimensional? $(3$ Marks$)1\mathrm{.}2$ The design hourly volume $($DHV$)$ after $10$ years from now is estimated as $1580$ vehicle per hour. The k factor, annual traffic growth, and directional distribution factor were taken as $0\mathrm{.}12,5\%,$ and $0\mathrm{.}6,$ respectively. What is the current average daily traffic $($ADT$).$ Hint: back calculate ADT. $(5$ Marks$)1\mathrm{.}3$ A $4-$lane road with a raised median is heavily travelled by a taxi rank in Gauteng. The relevant authority decided to make provision for taxi stops at all at$-$grade intersections with $2-$lane road. Draw a neat, labelled sketch to show the location of stops at or near the intersection. $(4$ Marks$)$