Design Example $2$

Given

Reliability $=90\%$

Performance Period $=20$ years

Overall Std$.$ Dev. $=0\mathrm{.}45$

$W18=5\mathrm{.}26$ million

Design Serviceability Loss $=2\mathrm{.}0$

Road bed soil $=5,000$

$\backslash$table$[[$Materials$,M_R,$Cost $($$$/$sq$.$yd$-$in$)],[$AC$,300,000,1\mathrm{.}70],[$Cement Stabilized Base,$500,000,0\mathrm{.}80],[$Bituminous Treated Base,$350,000,1\mathrm{.}20],[$Crushed Stone,$25,000,0\mathrm{.}40],[$Pit Run Gravel,$12,000,0\mathrm{.}32],[$Excavation$,-,0\mathrm{.}25]]$

Design the lowest cost flexible pavement section. Minimum thickness of Cement treated and asphalt treated base is $4-$inches. Compare your results with PaveXpress software tool.