EXAMPLE $2$

Determine the required thickness for a road based on these data:

$\backslash$table$[[$Carriageway width,$=7\mathrm{.}0m,],[$Layer Materials:,,$],[$Shoulder width,$=2\mathrm{.}0m,],[$Surfacing: Asphaltic concrete,,$],[$ADT$,$ both ways,$=4800,],[$Road base: Stabilised Crushed,,$],[$Aggregate$,,]]$