An ad hoc study committee will examine the impacts of existing methods of compensation on commercial motor vehicle driver retention and safety performance in the U.S. long-haul (150 miles or more) trucking and intercity bus sectors. The compensation methods examined will include, at a minimum, pay by the hour, pay by the mile, and pay for detention time. The committee will review the research literature and assess available data to determine if there are relationships among compensation methods, driver retention, driving behaviors, and safety performance. The committee will also consider how other factors may have a bearing on these relationships, such as non-wage rewards and work conditions. As part of its review, the committee will identify limitations and gaps in the data required for such assessments. The committee will collect primary data as needed and to the extent possible, such as by conducting case studies of trucking and bus companies and interviews of drivers and owner-operators. The committee will produce a final report with findings and conclusions about what is currently understood about the effects of compensation methods and other relevant factors on driver retention and safety performance. The report will contain recommendations to the sponsor and potentially to Congress on a research agenda that outlines the kinds of analytic methods, data gathering, and study designs that would be helpful for expanding and strengthening this understanding.