federal_register: 00-20144
Data license: Public Domain (U.S. Government data) · Data source: Federal Register API & Regulations.gov API
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| document_number | title | type | abstract | publication_date | pub_year | pub_month | html_url | pdf_url | agency_names | agency_ids | excerpts |
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| 00-20144 | Control of Emissions of Air Pollution from 2004 and Later Model Year Heavy-Duty Highway Engines and Vehicles; Revision of Light-Duty On-Board Diagnostics Requirements | Rule | Today's action finalizes a major new program to reduce emissions from on-highway heavy-duty engines and vehicles. These reductions will provide for cleaner air and greater public health protection, primarily by reducing ozone pollution. This program is the first phase of a multi-phase strategy to reduce emissions from heavy- duty engines and vehicles. A key element of this action is a reaffirmation of the technical and economic feasibility of the non-methane hydrocarbon plus nitrogen oxide (NMHC+NO<INF>X</INF>) standard promulgated in October, 1997 for diesel heavy-duty engines. This previously-codified standard will therefore remain unchanged and effective starting with the 2004 model year for heavy-duty diesel engines. This standard represents about a 50 percent reduction in emissions of nitrogen oxides, as well as reductions in hydrocarbons, from diesel trucks and buses. Heavy-duty diesel engines and vehicles will also be subject to new test procedures and associated requirements beginning in the 2007 model year that will ensure that emission standards are met across a broad range of engine operating conditions. In addition, this action puts in place new more stringent emission standards and related provisions for heavy-duty Otto-cycle (e.g., gasoline-fueled) engines and vehicles, beginning in the 2005 model year or sooner under two optional programs finalized today. Vehicles in this category include large full size pick-up trucks and the largest cargo and passenger vans. Today's action does not affect vehicles classified as Medium-duty Passenger Vehicles (generally, large SUVs and vans), which are subject to the recently finalized Tier 2 program standards. For heavy-duty Otto-cycle engines and vehicles affected by today's action, emission standards for oxides of nitrogen and hydrocarbons are reduced by approximately 75 percent from current standards. We are also finalizing requirements for on-board diagnostics systems for all heavy-duty vehicles and engines at or below 14,000 pounds gross vehicle weight rating (GVWR), as well as revising the on- board diagnostics requirements for diesel light-duty vehicles and trucks. The requirements promulgated or reaffirmed in today's action will result in lower emissions of oxides of nitrogen and hydrocarbons, as well as lower particulate matter due to reductions in secondary particulate formation (secondary particulate matter is not emitted directly from the engine, but is formed when emissions of oxides of nitrogen react with ammonia in the atmosphere to produce ammonium nitrate particulates) and will assist states and regions facing ozone air quality problems that are causing a range of adverse health effects, particularly respiratory impairment and related illnesses. For example, we project a reduction in oxides of nitrogen emissions of 1,028,000 tons per year by 2010, the time frame when all states will have had to demonstrate compliance with air quality standards. In addition, the program will reduce the contribution of the on-highway heavy-duty category to other serious public health and environmental problems, including volatile organic compounds (VOC), secondary particulate matter (PM), and toxic air pollutants. Furthermore, we project that the significant environmental benefits of this program would come at an average projected long-term cost increase of less than $400 per vehicle for heavy-duty diesel engines (less than approximately $800 in the near-term) and less than $300 per vehicle for heavy-duty gasoline vehicles and engines in both the long- term and near-term. | 2000-10-06 | 2000 | 10 | https://www.federalregister.gov/documents/2000/10/06/00-20144/control-of-emissions-of-air-pollution-from-2004-and-later-model-year-heavy-duty-highway-engines-and | https://www.govinfo.gov/content/pkg/FR-2000-10-06/pdf/00-20144.pdf | Environmental Protection Agency | 145 | Today's action finalizes a major new program to reduce emissions from on-highway heavy-duty engines and vehicles. These reductions will provide for cleaner air and greater public health protection, primarily by reducing ozone pollution. This program is... |