The Regulatory Impact Analysis (RIA) for this rule presents analysis and supporting data for the provisions EPA is reviewing or promulgating for model year 2004 and later on-highway heavy-duty diesel and otto-cycle engines and vehicles. Chapter 1 presents a brief summary of each chapter. Chapter 2 provides an overview of the health and environmental effects associated with ozone, particulate matter, and other harmful pollution associated with emissions from heavy-duty engines and vehicles. Chapter 2 also reviews some of EPA's key concerns at this time and provides national NOx and VOC emissions inventories and emissions trends, with specific emphasis on the contribution from on-highway heavy-duty diesel and otto-cycle vehicles. Chapter 3 presents the technologies available and discusses their ability to reach the required emission levels. Chapter 3 is divided into two major sub-chapters, the first dealing with HD diesel technologies, and the second with HD otto-cycle technologies. Chapter 4 presents EPA's best assessment of the economic impacts which will result from the HD diesel standards. The assessment includes EPA's estimates of the technology packages manufactures will use, as well as the costs associated with new certification and compliance requirements. Costs are estimated on a per-vehicle basis, as well as an aggregate cost to society. Chapter 4 also includes an analysis which indicates how sensitive the cost assessment is to some of EPA's best estimates. Chapter 5 presents EPA's best assessment of the economic impacts which will result from the HD otto-cycle engine and vehicle standards. The assessment includes EPA's estimates of the technology packages manufactures will use, as well as the costs associated with new certification and compliance requirements. Costs are estimated on a per-vehicle basis, as well as an aggregate cost to society.

Title from PDF title screen (viewed on August 17, 2015). "EPA420-R-00-010." "July 2000." Includes bibliographical references.