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The preventive maintenance optimal timing methodology is problem statement and research objective, and outlines the
based on analyzing an agency's performance data gathered scope of the study. Chapter 2 describes the findings of the lit-
from applying treatments to pavements at different times. erature search and the preventive maintenance treatments,
Because many agencies do not have such data, a plan was applicable to bituminous and concrete-surfaced pavements.
developed to assist these agencies in establishing test sections Chapter 3 describes the methodology recommended for ana-
and collecting such data. The plan is found in Appendix D. lyzing preventive maintenance data and identifying appro-
priate treatments and timing for specific situations. It also
ORGANIZATION OF THE REPORT demonstrates the applicability of this methodology using data
obtained from SHAs. Chapter 4 summarizes the significant
This report consists of four chapters. This chapter pro- conclusions of the project and presents suggestions for future
vides the introduction and research approach, describes the research.
