الفهرس 
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Abstract
This study aims to create a new contractor payment method for HWY
construction works depends on actual as constructed pavement performance. To
achieve this objective, a comparison between as constructed and as designed
pavement section was conducted by analyzing their performance using
KENLA YER program through two stages. In the first stage, ESAL’s were
estimated for the assumed as constructed pavement sections based on the
common expected construction defects in terms of single defects as reduction in
thickness ”T” or in modulus of resilience ”Mr” (140 case) or double defects, that
mean combining two defects (I225 case). A case study for triple and fourth
defects (IO cases) was analyzed to investigate the danger of combining defects.
The second stage concerned with converting the obtained ESAL for as
constructed section to ”n2” years knowing pavement design life ”n I” using the
developed equation in this study. By making economical comparison of assumed
common maintenance plane for as designed section versus as constructed section;
contractor payment factor was created. There are 30 obtained figures for this
method, from which user will use only 4 figures to apply the proposed method,
depending on the type of construction defect and the design pavement life.
Growth rate ”r” and money interest rate ”i” are also considered to give the new
method straightness and accuracy. Finally, the study concluded that combined
construction defects have great effect on pavement life consequently high
difference between the traditional payment method and performance payment
method obtained by considering these defects. So, it is recommended to use
payment method depends on actual as constructed section perfonnance and
consider it as a whole object not some separated layers during paying for
contractor.