Asphalt content, aggregate characteristics, pavement layersthicknesses and their degree of compaction, and initial pavementsmoothness are key quality control aspects in asphalt pavementconstruction. These measurable items are routinely checked duringthe constmction process.

The overall pavement performance life may be significantlyaffected when the specified values of those items are not achievedin situ. Quantification of their impact on pavement performanceis essential for quality roadway construction, and rational payadjustment factors.

This paper presents an approach to estimate the expected loss(or gain) in pavement performance life resulting from any in situdeviation in the above performance related characteristics fromthe specified values.