Item 19 - Agreement for Pavement Managment Program Update

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o' CT,; &GO Countywide Pavement Management Plan Guidelines Local Tax Dollars at Work Acceptability Criteria At the time of re -inspection, the actual distresses will be re -inspected and verified, and any corrections made, if necessary. Distress types and severities must be the same and re -measured quantities within ±10% of the original measured quantity. If corrections are required on more than 10% of the re -inspected sample unit, then an additional 5% will be re -inspected. This will continue until more than 95% of the re -inspected sections meet the acceptability criteria. PCI Comparison with Past Surveys As another level of quality control, the new PCIs are compared with the previous PCIs. If they differ by more than ±10 PCI points, these sections are automatically flagged for further investigation. If PCI Increases 10 points The section is investigated to see if a maintenance and rehabilitation event has occurred since the last survey, but has not been recorded. Typically, it may include activities such as: • Crack sealing activities —changes medium or high severity cracking to low severity • Patching activities — alligator cracking that has been removed and patched, so that the resultant PCI is increased. • Surface seals • Overlay • Others Therefore, an up to date maintenance and rehabilitation history file in the pavement management database is desirable, both for historical accuracy as well as to provide additional quality control. If PCI decreases 10 points The section is checked to see if the average deterioration rate (usually 3 to 4 points per year) is exceeded. If the drop in PCI is within range of what is acceptable, no further action is required. If the drop is more than the acceptable range, a re -inspection will be performed. The default performance curves in the pavement management software form the basis for what is acceptable. Effective March 2024 A-20