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62 ATRI American Transportation Research Institute BISC Bus Industry Safety Council CDL Commercial driverâs license CFR Code of Federal Regulations CMV Commercial motor vehicle CR Critical reason CT Combination-unit truck (tractor-trailer) CVO Commercial vehicle operations DOT Department of Transportation (federal, unless otherwise specified) ECBS Electrically controlled braking systems EOBRs Electric onboard recorders ESC Electronic stability control FMCSR Federal Motor Carrier Safety Regulation GIS Geographic Information System GPS Global positioning system HOS Hours-of-service HPV Higher productivity vehicle IIHS Insurance Institute for Highway Safety LCV Longer combination vehicle LTCCS Large Truck Crash Causation Study LTL Less-than truckload NPTC National Private Truck Council OBSM On-board safety monitoring OOS Out-of-service PAR Police accident report R&D Research and development ROI Return on investment SM Safety manager (generic term including other, similar job titles) ST Single-unit truck (Straight Truck) SV Single-vehicle [crash] TC Transport Canada TCA Truckload Carriers Association TL Truckload TPMS Tire pressure monitoring system TRIS Transportation Research Information Services TT Transport Topics (publication) UMTRI University of Michigan Transportation Research Institute VMT Vehicle-miles traveled VTTI Virginia Tech Transportation Institute ACRONYMS