Comments made on 4/12/23.

The second set of proposed standards Would apply to heavy-duty vocational Vehicles such as delivery trucks dump Trucks public utility trucks Transit School buses and more The proposed standards are the final Pieces of epa's clean trucks plan and Will complement the heavy duty nitrogen Oxide standards we established last December Like the light and medium duty proposal The heavy duty proposal uses Performance-based technology standards That enable manufacturers to achieve Compliance efficiently based on the Composition of their fleets