Department of Transportation Federal Highways Administration, National Highway Traffic Safety Administration, and Federal Motor Carrier Safety Administration, and the Department of Energy’s Bioenergy Technology Office, Hydrogen and Fuel Cell Technologies Office, and Vehicle Technologies Office, as well as other federal agencies with jurisdiction over medium and heavy duty transportation decarbonization, including the Environmental Protection Agency and Department of Homeland Security, to streamline and coordinate efforts to reduce emissions for freight transportation. (A) The Office shall provide a report to Congress identifying barriers to decarbonization of medium and heavy duty road transportation, including charging and fueling availability, technology research and development needs, vehicle availability, battery and component cost and supply constraints, potential regulatory impediments such as vehicle weight allowance and treatment of near-zero emissions technologies, and other barriers not later than 180 days after enactment. (B) The Joint Office shall develop technical assistance, and support research to support the decarbonization of medium and heavy duty trucks and other freight transportation equipment and operations. The Joint Office shall support research, planning, and funding for charging and fueling infrastructure that supports medium and heavy duty vehicle electrification including high-powered charging depots, hydrogen fueling infrastructure, grid reliability solutions, smart charge management, and distributed energy resources, including integration with on-site energy storage and renewable energy generation. (C) The Joint Office shall identify and support the development and deployment of alternative sustainable low-carbon fuels including biofuels, clean hydrogen, methanol, and ammonia, and associated powertrain technologies, including batteries, fuel cells, and hydrogen internal combustion engines. Provided further , That the Joint Office of Energy and Transportation shall identify and