FMCSA proposes to amend the Federal Motor Carrier Safety Regulations (FMCSRs) to adopt revised methodologies that would result in a safety fitness determination (SFD). The proposed methodologies would determine when a motor carrier is not fit to operate commercial motor vehicles (CMVs) in or affecting interstate commerce based on (1) the carrier’s performance in relation to five of the Agency’s Behavioral Analysis and Safety Improvement Categories (BASICs); (2) an investigation; or (3) a combination of on-road safety data and investigation information. The intended effect of this action is to reduce crashes caused by CMV drivers and motor carriers that result in death, injuries, and property damage on U.S. highways by more effectively using FMCSA data and resources to identify unfit motor carriers and remove them from the Nation’s roadways.