The adverse impacts of greenhouse gasses (GHG) and the imperative for reducing the
existing rate of GHG production are well established. In the United States, the largest source …

The development of a trip-assignment model designed to systematically compute emissions-
optimized traffic flows for carbon monoxide is explored. Then the exploratory theoretical …

Regional vehicle emissions are based on traffic activity data typically obtained from a
conventional four-step travel demand model, with the usual limitation of link volumes …

Emission reduction strategies are gaining attention as planning agencies work towards
adherence to air quality conformity standards. As state departments of transportation (DOTs) …

Vehicle emission models enable transportation planners to evaluate the environmental
implications of alternative transportation policies and assist decision makers in selecting the …

Reducing fuel consumption and greenhouse gas emissions is becoming increasingly
important in the United States, and new legislation can be expected in the near future that …

Emission reduction strategies are gaining greater attention as a support of the national
objective for a sustainable and green transportation system. A large percentage of the …

Travel models are commonly used to forecast vehicle-kilometers traveled (vehicle-miles
traveled) and speed, from which mobile source emissions are calculated. Most existing …

Transportation vehicle operations in the US contribute 32% of the nation's emissions of
carbon dioxide, and 7% of the world's emissions from energy use. Technical options exist to …

Freight transportation accounts for 9% of total greenhouse gas (GHG) emissions in the
United States. The contributions of each of five freight transportation modes to total freight …