$-$ Problem $1$:

A new flexible pavement is to be built on a major $2-$lane expressway extension from Hatch to Deming. Traffic forecasting analysis has yield an estimate demand of $20$ million ESALs over the $20-$year performance period $($wt$18=20\backslash$times $106).$

Local conditions: Average resilient modulus of the subgrade $($Mr$)$: $5,000$ psiResilient modulus of the base course material $($E$2)$: $30,000$ psiResilient modulus of the subbase course material $($E$3)$: $15,000$ psi Resilient modulus of the asphalt concrete layer $($E$1)$: $450,000$ psi

Both the base and subbase material exhibit excellent drainage.

Four bids have been submitted to your office for review:

Bid $1$: $$1,132,000\mathrm{.}00$ per mile

Asphalt thickness $($D$1)$: $7\mathrm{.}5$ inches

Base thickness $($D$2)$: $8$ inches

Subbase thickness $($D$3)$: $8$ inches

Bid $2$: $$890,000\mathrm{.}00$ per mile

Asphalt thickness $($D$1)$: $3$ inches

Base thickness $($D$2)$: $10$ inches

Subbase thickness $($D$3)$: $11$ inches

Bid $3$: $$970,000\mathrm{.}00$ per mile

Asphalt thickness $($D$1)$: $8$ inches

Base thickness $($D$2)$: $3$ inches

Subbase thickness $($D$3)$: $4$ inches

Bid $4$: $$945,000\mathrm{.}00$ per mile

Asphalt thickness $($D$1)$: $6$ inches

Base thickness $($D$2)$: $5$ inches

Subbase thickness $($D$3)$: $8$ inches

$1\mathrm{.}1$ Using the original AASHTO equation, assess the suitability of the proposed pavement structures to meet traffic demands and select the best alternative $1\mathrm{.}2$ Repeat your analysis using the modified AASHTO equation. Select the best alternative. $1\mathrm{.}3$ Repeat your analysis using the final AASHTO equation. Select the best alternative.

Problem $2$ Solve problem $11\mathrm{.}9$ on page $532$

Problem $3$ Solve problem $11\mathrm{.}10$ on page $532$