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pavement design

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FLEXIBLE PAVEMENT DESIGN<br />

LEVELS OF RELIABILITY<br />

AASHTO 93<br />

FUNCTIONAL<br />

CLASIFICATION<br />

INTERSTATE<br />

AND OTHER<br />

FREEWAYS<br />

PRINCIPAL<br />

ARTERIALS<br />

LEVEL OF RELIABILITY<br />

URBAN RURAL<br />

85 – 99.9 80 – 99.9<br />

80 – 99 75 – 95<br />

COLLECTORS 80 – 95 75 – 95<br />

LOCAL 50 - 80 50 - 80

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