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... 1 S U M M A R Y Highway agencies perform a variety of maintenance activities to maintain and preserve highway pavements. Generally, highway agencies document information pertaining to these maintenance actions, including methods, rates, basis of measurements, costs, performance, and other related factors as part of a maintenance management system.
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... 2 Framework for a Pavement-Maintenance Database System PMDb is a database framework for archiving maintenance events and condition observation events for a defined section of a roadway. Each event record in PMDb contains information on the specific pavement section where the maintenance and condition events may occur.

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