Item 19 - Agreement for Pavement Managment Program Update

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o' CTA &GO Countywide Pavement Management Plan Guidelines Local Tax Dollars at Work 4. Conduct the distress inspection by walking on the pavement shoulder or sidewalk adjacent to the sample unit being surveyed, measuring the quantity of each severity level of every distress type present, and recording the data. Each distress must correspond in type and severity to that described in the Paver Distress Identification Manuals. 5. A copy of the recorded distress data should be provided on a weekly basis to the responsible agency personnel for quality assurance. It should be noted that windshield surveys, while reasonably fast and inexpensive, do have shortcomings. Chief among these are that low severity distresses are difficult to identify in this procedure, and consequently, the PCI may be significantly higher than it ought to be. A pavement may therefore be selected for a slurry seal when a thin overlay is more appropriate or for a thin overlay when a thick overlay is more appropriate. This may result in treatments that are not cost- effective. When certain pavements are a high priority (usually those with high traffic volumes or other distinctive features) for a local agency, walking surveys are preferred to ensure that all pertinent distresses are captured, although windshield surveys are the minimum standard. For residential or local streets, windshield surveys are acceptable. When automated or semi -automated surveys are used, the following procedure should be followed. The Local Agency should: Establish a series of test sites Determine the distress data on those sites using a walking survey Compare the data from the automated equipment with the walking survey data. It is desirable for the PCI values from the automated survey to be within plus or minus five PCI points of the values obtained from the walking survey. However, plus or minus ten PCI points is generally considered acceptable. Any site with a difference greater than ten PCI points should be carefully rechecked to determine the cause for the discrepancy. The agency must then make a judgement whether the automated data is acceptable. OCTA's role is limited to the evaluation of the distress data submitted by the agencies and does not include a verification or evaluation of the automated equipment or procedure used by the agency submitting the automated survey. Inspection Frequency All streets identified on the MPAH must be surveyed at least once every two years. All local streets must be surveyed at least once every six years. This is a requirement of OCTA's PMP certification program. Effective March 2024 2-4