A provincial roads department has opened two two$-$lane

roads with ES$3$ design traffic. At the time of opening both

roads carry the following traffic in the heaviest trafficked

lane.

Axle Load Group $($KN$)$ Number of axles per day

$5$ to $401000$

$40$ to $80100$

$80$ to $12050$

Using a load equivalence Exponent of $4,$ determine after how

many years the roads will reach the design traffic for the following

scenario;

i$.$ Road A$-$There is no E$80$ growth during the life of the facility

ii$.$ Road B$-$for the first $14$ years traffic will grow at $6\%$ per year,

and then the E$80$s will reduce at $4\%.$