The objective here is to evaluate the intra-and inter-vehicle variability in realworld light-duty gasoline vehicle emissions and assess implications for development of onroad vehicle emission inventories. A field study was conducted to characterize variability for selected vehicles for both total emissions and emission rates by routes, time of day, road grade, and among vehicles. Real-world dat...

The purpose of this paper is to review current studies concerning the relationship of fuel composition to vehicle engine-out and tail-pipe emissions and to outline future research needed in this area. A number of recent combustion experiments and vehicle studies demonstrated that reformulated gasoline can reduce vehicle engine-out, tail-pipe, running-loss, and evaporative emissions. Some of the...

Vehicle tailpipe emissions are major sources of air pollution and greenhouse gases. In addition to the ongoing efforts on emissions reduction, we believe there is a need to explore an innovating approach in which drivers routing decisions are influenced to minimize emissions and fuel consumption. In order to evaluate such transportation systems, we develop environmental traffic assignment model...

Introduction Conclusions References

The Fuel Quality Standards Act 2000, which received Royal Assent on 21 December 2000, provides the framework for a national fuel quality standards regime. This legislation has been developed in response to an urgent need to address the quality of fuel currently available in Australia. New vehicle emission standards, harmonising Australian standards with international vehicle emission standards,...

A fuel-cycle model—called the Greenhouse gases, Regulated Emissions, and Energy use in Transportation (GREET) model—has been developed at Argonne National Laboratory to evaluate well-to-wheels (WTW) energy and emission impacts of motor vehicle technologies fueled with various transportation fuels. The new GREET version has up-to-date information regarding energy use and emissions for fuel produ...

Mobile source emission models currently used by state and federal agencies (e.g., Environmental Protection Agency’s MOBILE and California Air Resources Board’s EMFAC) are often inadequate for analyzing the emissions impact of various transportation control measures, intelligent transportation systems, alternative fuel vehicles, and more sophisticated inspection/maintenance programs contained in...