This report describes employee travel in Yosemite National Park. More specifically, it describes the travel undertaken by employees as it relates to their roles as employees. Thus, commuting to work, personal stops made in conjunction with commute trips, trips made to complete work-related...

In general, the limitations of the current California vehicle emissions inventory models can be summarized as: - There is no direct connection between the regional emissions inventory model and the gridded emissions model. Separate model runs must be processed to develop regional emissions...

Mel Webber wrote and thought a lot about cars. He frequently pointed out that cars remain the first choice for transport for most people because their convenience and door-to-door accessibility are unmatched by any other mode. However, many cities are headed toward traffic paralysis because cars...

Many urban regions in the U.S. are planning to build extensive networks of new high-occupancy 3ehicle (HOV) freeway lanes. Past modelling efforts are reviewed and travel demand simulations by the authors are used to demonstrate that new HOV lanes may increase travel (vehicle-miles) and increase...

This paper focuses on ultracapactors (electrochemical capacitors) as energy storage in vehicle applications and thus evaluates the present state-of-the-art of ultracapacitor technologies and their suitability for use in electric and hybrid drivelines of various types of vehicles. A key...

Local governments can have a large effect on carbon emissions through land use zoning, building codes, transport infrastructure investments, and support for transportation alternatives. Recognizing this, many cities have developed climate action plans, containing a disparate mix of mostly...

A survey of vehicle owners was conducted in New York State and California to explore the potential target market for methanol in the household sector. Data were colleted on revealed and reported premium gasoline purchase behavior and willingness to pay for cleaner fuels and more power. We found...

Emission inventory models are a key input to regional air quality plans, called State Implementation Plans (SIPs) in the US. These plans frequently include emissions caps, or “budgets,†to which transportation system emissions must be compared. When emissions models and vehicle...