The first year AADT on a six$-$lane freeway located in an urban area is expected to be $25,000ve\frac{h}{?}$ day. The

growth rate for all the categories of vehicles is expected to be $2\%$ per annum throughout the life of the

pavement. The design life of the pavement is $20$ years and the projected vehicle mix during the first life

of operation is:

Passenger cars $=50\%$

Single$-$unit trucks, two$-$axle, four$-$tire $=28\%$