Problem $2$

Assuming that the interstate highway is $6$ miles long, determine which pavement design $($flexible or rigid$)$ will be most cost$-$effective. Use the information included in the tables below.

Use the following future maintenance strategies:

a$)$ Flexible Pavement

$($a$)12$ Years: Mill and fill mainline only with $1\mathrm{.}5$ inches

$($a$)25$ Years: Repair $1\%$ of the pavement, mill and overlay with $4$ inches

b$)$ Rigid Pavement

$($a$)25$ Years: Repair $2\%$ full depth and $1\%$ partial depth and grind for smoothness

Refer to ODOT pavement design manual Section $700$ for examples on ODOT life cycle cost analysis procedure.