America's highway system is critical to meeting the mobility and economic needs of local communities, regions, and the nation. Developments in research and technology-such as advanced materials, communications technology, new data collection technologies, and human factors science-offer a new opportunity to improve the safety and reliability of this important national resource. Breakthrough resolution of significant transportation problems, however, requires concentrated resources over a short time frame. Reflecting this need, the second Strategic Highway Research Program (SHRP 2) has an intense, large-scale focus, integrates multiple fields of research and technology, and is fundamentally different from the broad, missionoriented, discipline-based research programs that have been the mainstay of the highway research industry for half a century. The need for SHRP 2 was identified in TRB Special Report 260: Strategic Highway Research: Saving Lives, Reducing Congestion, Improving Quality of Life, published in 2001 and based on a study sponsored by Congress through the Transportation Equity Act for the 21st Century (TEA-21). SHRP 2, modeled after the first Strategic Highway Research Program, is a focused, timeconstrained, management-driven program designed to complement existing highway research programs. SHRP 2 focuses on applied research in four focus areas: Safety, to prevent or reduce the severity of highway crashes by understanding driver behavior; Renewal, to address the aging infrastructure through rapid design and construction methods that cause minimal disruptions and produce lasting facilities; Reliability, to reduce congestion through incident reduction, management, response, and mitigation; and Capacity, to integrate mobility, economic, environmental, and community needs in the planning and designing of new transportation capacity.

In 1987 the Michigan Department of Transportation (MDOT) began using rubblization of portland cement concrete (PCC) pavement followed by the application of a hot-mix asphalt (HMA) overlay as a rehabilitation method for deteriorated PCC pavements. Early projects constructed in Michigan used the resonant frequency breaker to rubblize the PCC pavement, but by 1997 MDOT began to use the multi-head breaker (MHB) also. In 1999, because some rubblization projects needed rehabilitation after fewer than 12 years of service, MDOT initiated a study to identify causes for underperforming rubblized concrete pavement projects. The current study, initiated in 2005, was conducted specifically to investigate the performance of rubblized projects constructed with the MHB with the use of data provided by MDOT. Analysis of projects constructed in Michigan that used the MHB between 1997 and 2002 revealed that 20 of the 21 pavement sections evaluated had a distress index (DI) condition rating of good, and all sections had ride quality index values in the excellent or good category. The international roughness index values also indicated that all pavements were in good condition, with values of less than 95 in./mi. The DI for most sections indicated that the distress was due to longitudinal cracking at the pavement construction joint and at the pavement edge. Most distresses present on the pavement sections seemed to be related to poor or insufficient drainage, overlay construction issues, or HMA mixture problems.

Over the past 4 years, the Oklahoma Department of Transportation (ODOT) has implemented a pavement management system (PMS) to provide the agency with accurate, current, and relevant pavement condition information for use in prioritizing candidate pavement projects based on economic and engineering analyses. Now that the implementation process has been completed, ODOT routinely uses its PMS to enhance network- and project-level decision making. Currently, ODOT contracts with a vendor to collect network-level sensor, geometric, and distress data using automated data collection techniques. The data are then processed with a combination of automated and semiautomated techniques. The agency recognized that the value of the recommendations made by its PMS is greatly dependent on the quality of the collected information included in the PMS. Therefore, ODOT has emphasized the importance of checking the quality of data before they are used for important management decisions. As one way of assessing the data quality, ODOT developed checks of the data collected and submitted by the vendor. ODOT realized the value of creating an automated procedure for checking the final delivered pavement condition database to provide a rapid, repeatable, and accurate assessment of the data quality. To address this need, ODOT developed a visual basic application tool based on Microsoft Access to provide a user-friendly interface to the systematic procedure of conducting the many required data quality checks. In addition to the control and verification site testing procedures and distress ratings checks, this tool will be used by the agency as part of a comprehensive approach to assessing pavement condition data accuracy and completeness. Details regarding the creation and function of the quality assurance tool are provided in this paper.

The Second Strategic Highway Research ProgramAmerica's highway system is critical to meeting the mobility and economic needs of local communities, regions, and the nation. Developments in research and technology-such as advanced materials, communications technology, new data collection technologies, and human factors science-offer a new opportunity to improve the safety and reliability of this important national resource. Breakthrough resolution of significant transportation problems, however, requires concentrated resources over a short time frame. Reflecting this need, the second Strategic Highway Research Program (SHRP 2) has an intense, large-scale focus, integrates multiple fields of research and technology, and is fundamentally different from the broad, mission-oriented, discipline-based research programs that have been the mainstay of the highway research industry for half a century.

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