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The EPA and the Department of Transportation, in close coordination with the California Air Resources Board, developed a comprehensive National Program for Medium- and Heavy-Duty Vehicle Greenhouse Gas Emission and Fuel Efficiency Standards for model years beyond 2018. These standards will further reduce greenhouse gas emissions and fuel consumption from a wide range of on-road vehicles from semi-trucks to the largest pickup trucks and vans, and all types and sizes of work trucks and buses. This action is in continued response to the President's directive to take coordinated steps to produce a new generation of clean vehicles and follows the first ever Greenhouse Gas Emissions Standards and Fuel Efficiency Standards for Medium- and Heavy-Duty Engines and Vehicles.