$(4\mathrm{.}14)$ A rigid pavement is designed with a $10-$inch slab, an Ec of $6$ million $l\frac{b}{i}{n}^2,$ a concrete modulus of rupture of $432l\frac{b}{i}{n}^2,$ a load transfer coefficient of $3\mathrm{.}0,$ an initial PSI of $4\mathrm{.}7,$ and a TSI of $2\mathrm{.}5.$ The overall standard deviation is $0\mathrm{.}35,$ the modulus of subgrade reaction is $190I\frac{b}{i}{n}^3,$ and a reliability of $90\%$ is used along with a drainage coefficient of $0\mathrm{.}8.$ The pavement is designed assuming that traffic is composed entirely of trucks $(100$ per day$).$ Each truck has one $20-$kip single axle and one $42-$kip tandem axle $($the effect of all other vehicles is ignored$).$ A section of this road is to be replaced $($due to different subgrade characteristics$)$ with a flexible pavement having an SN of $4$ and is expected to last the same