1.3 Performance Period
For rigid pavements, the initial pavement structure shall
be designed and analyzed for a performance period of 30 yr. A performance
period other than 30 yr. may be utilized with justifications. For
example, an existing pavement to be widened will be completely reconstructed
within 15 yr. In this case, a selection of a 15-yr. performance
period is more reasonable and justifiable for the widening.