Emissions inspection and maintenance (I/M) programs subject vehicles to periodic inspections of their emission control systems. Despite widespread use of these programs in air-quality management, policy makers and the public have found a number of problems associated with them. Prominent among these issues is the perception that emissions benefits and other impacts of I/M programs have not been evaluated adequately. Evaluating Vehicle Emissions Inspection and Maintenance Programs assesses the effectiveness of these programs for reducing mobile source emissions. In this report, the committee evaluates the differences in the characteristics of motor vehicle emissions in areas with and without I/M programs, identifies criteria and methodologies for their evaluation, and recommends improvements to the programs. Most useful of all, this book will help summarize the observed benefits of these programs and how they can be redirected in the future to increase their effectiveness.

Special edition of the Federal Register, containing a codification of documents of general applicability and future effect ... with ancillaries.

Fundamentals of Medium/Heavy Duty Commercial Vehicle Systems, Second Edition offers comprehensive coverage of basic concepts and fundamentals, building up to advanced instruction on the latest technology coming to market for medium- and heavy-duty trucks and buses. This industry-leading Second Edition includes six new chapters that reflect state-of-the-art technological innovations, such as distributed electronic control systems, energy-saving technologies, and automated driver-assistance systems.

The purpose of this manual is to provide clear and helpful information for maintaining gravel roads. Very little technical help is available to small agencies that are responsible for managing these roads. Gravel road maintenance has traditionally been "more of an art than a science" and very few formal standards exist. This manual contains guidelines to help answer the questions that arise concerning gravel road maintenance such as: What is enough surface crown? What is too much? What causes corrugation? The information is as nontechnical as possible without sacrificing clear guidelines and instructions on how to do the job right.

In the past few decades, freight transport on roads has grown considerably because of the quick and flexible movement of goods. With an expanding market due to product specialization, there will be an increase in the demand for freight transport. There are however, several negative implications for the environment (air and noise pollution), human health and other more far-reaching phenomena such as acidification, photochemical air pollution and the greenhouse effect. Solutions to this problem are probed in this book including the stimulation of technological breakthroughs, new transport policies and better traffic management. The book provides a survey of present and potential approaches to reconcile the strong need for increasing transport and the necessity to stop the current destruction of natural resources and harm to human health.