05-13-1998 Council Agenda - Laserfiche WebLink

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PASER = Rating System Deterioration with time for a typical pavement Rating pavement surface condition Using our understanding of surface distress, asphalt pavement sur- faces can be evaluated and rated. The rating scale ranges between "1" (very poor condition) to "10" (excellent condition). Most pave- ments will deteriorate through the phases listed in the rating scale. The time it takes to go from an excellent (10) to a very poor condition (1) depends largely on the quality of the original construction and the amount of heavy traffic loading. Pavement Condition 10 Excellent 6 Good 4 Fair 2 Poor Pavement Age Once significant deterioration begins it is common to see pavements deteriorate rapidly. This is usually due to a combination of loading and the effects of additional moisture. As a pavement ages and addi- tional cracking develops, more moisture can enter the pavement and accelerate the rate of deterioration. Look at the photographs which follow and become familiar with the descriptions of the individual rating categories. To evaluate an indi- vidual pavement, first determine its general condition. Is it relatively new, toward the top end of the scale, or in very poor condition and at the bottom of the scale, or somewhere in between? Next, think gener- ally about the appropriate maintenance method. Use the following categories: Rating 9 & 10- no maintenance required Rating 7& 8- routine maintenance, cracksealing and minor patching Rating 5 & 6- preservative treatments (sealcoating) Rating 3 & 4- structural improvement and leveling (overlay or recycling) Rating 1 & 2- reconstruction Finally, review the individual pavement distress and select the appro- priate surface rating. Page 49