812159-RevSafetyImpactsRegulatoryFuelEfficiencyTechMDHD.pdf: Review and Analysis of Potential Safety Impacts of and Regulatory Barriers to Fuel Efficiency Technologies and Alternative Fuels In Medium- and Heavy-Duty Vehicles Download file: 812159-RevSafetyImpactsRegulatoryFuelEfficiencyTechMDHD.pdf: Review and Analysis of Potential Safety Impacts of and Regulatory Barriers to Fuel Efficiency Technologies and Alternative Fuels In Medium- and Heavy-Duty Vehicles