The MAP-21 and FAST ACT surface transportation authorization bills have required that pavement performance measures be established for the Interstate Highway System (IHS). As a result of their enactment, the Federal Highway Administration (FHWA) issued a Notice of Proposed Rulemaking to establish pavement performance measures to assess the condition of the pavements on the IHS; these measures were subsequently issued as a final rule.
Because the measures rely on pavement condition data stored in the Highway Performance Monitoring System (HPMS), FHWA undertook a study in 2015 to: (1) collect an unbiased baseline condition of a statistically significant sample of the entire IHS and produce a report indicating the pavement condition on the IHS nationally and in each State where data were collected, (2) determine if HPMS is an unbiased representation of the pavement condition of the IHS, and (3) recommend improvements to HPMS data collection and reporting necessary to make HPMS unbiased or improve its precision. The results provided the outcomes needed at the time and these results are contained in Interstate Pavement Condition Sampling 1 (2015).
Two years later, FHWA pursued a follow-up study addressing the same objectives plus some additional investigations. The report contained herein contains the results of a literature review that was conducted and presented in this report to identify new developments in the HPMS area. The 2016 HPMS data was reviewed for data completeness and various stratification factors were considered. This review provided the basis for selecting a route to collect a 7,500 mile sample of the IHS reflecting actual stratification of the entire IHS (based on climate zone, population zone, surface type, and terrain) as observed from the 2016 HPMS. This report addresses the development and execution of the data collection plan, including the data quality management plan that was developed for data collection and data analyses. The report also details the data analyses activities that were performed as part of the study, including the associated conclusions and recommendations, which were numerous.