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A flexible pavement has a structural number of 4.2 (all drainage coefficients are equal to 1.0)....

A flexible pavement has a structural number of 4.2 (all drainage coefficients are equal to 1.0). The initial PSI is 4.5 and the terminal serviceability is 2.5. The soil (subgrade) has a CBR of 8. The overall standard deviation is 0.40 and the reliability is 92%. The pavement is currently designed for 1500 equivalent 18-kip single axle loads per day.

determine Mr

if the number of 18-kip single-axle loads were
to increase by 30%, by how many years would the
pavement’s design life be reduced?

Engineering   Civil-Engineering   
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