Revision of Tier 4 Criteria Pollutant Standards, Part 1: Amendments to Phase-In Schedule for Light-Duty and Medium-Duty Vehicles

 Table 6--Tier 4 LDV, LDT, and MDPV Fleet Average NMOG+NOX Standards ---------------------------------------------------------------------------------------------------------------- LDV, LDT1-2 (GVWR LDT3-4 (GVWR 6,001-8,500 lb) and MDPV NMOG+NOX X and per-vehicle standards for PM, CO, and HCHO through a combination of technologies that included a significantly increased adoption of BEVs, which certify as emitting zero [[Page 28470]] mg/mile of all tailpipe emissions, and better emissions control technologies for internal combustion engine (ICE) vehicles, hybrid electric vehicles (HEVs), and plug-in hybrid electric vehicles (PHEVs). Further discussion of these technologies can be found in the LMDV Multipollutant Rule's Regulatory Impact Analysis (``LMDV RIA'') and in Chapter 2 of the 2023 proposed LMDV Multipollutant Rule's Draft RIA (``LMDV DRIA'').\23\ --------------------------------------------------------------------------- \23\ See Chapter 3.2.5 at 3-52 of U.S. Environmental Protection Agency, Regulatory Impact Analysis: Multi-Pollutant Emissions Standards for Model Years 2027 and Later Light-Duty and Medium-Duty Vehicles, (March 2024), available at https://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=P1019VPM.pdf . (``LMDV RIA''); and Chapter 2 of U.S. Environmental Protection Agency, Draft Regulatory Impact Analysis: Multi-Pollutant Emissions Standards for Model Years 2027 and La