Suburban sprawl has been widely criticized for its contribution to auto dependence. Numerous studies have found that suburban residents drive more and walk less than residents in traditional neighborhoods. Accordingly, smart growth programs have been advocated as a means to reduce auto travel....

Hydrogen delivery is a critical contributor to the cost, energy use and emissions associated with hydrogen pathways involving central plant production. The choice of the lowest-cost delivery mode (compressed gas trucks, cryogenic liquid trucks or gas pipelines) will depend upon specific...

Despite rapid economic growth in China over the past decade and rise in personal car ownership, most Chinese still rely on two-wheeled vehicles (2WV) or public transport for commuting. The majority of these 2WVs are bicycles. In recent years, concern about poor air quality in urban areas and...

Home refueling helped address the fuel availability issue for gasoline vehicles a century ago; it may still have important implications for alternative fuel vehicles today. The positive consumer response and lessons learned about home refueling for compressed natural gas vehicles, battery...

We describe our experience teaching an overview course on urban modeling for graduate students at the University of California, Davis. It was decided at the outset that we would let the students run actual calibrated models in this class. This may be the first course where students were exposed...

Station availability is a major concern when the deployment of an alternative fuel such as hydrogen is considered. Too few stations will make the network inconvenient, while too many will make the refueling network cost prohibitive. As a follow-up analysis to two station siting analyses...

Proceedings of the National Hydrogen Association Annual Hydrogen Conference (NHA 2005), Washington, DC, March 29 - April 1, 2005 Hydrogen offers a wide range of future environmental and social benefits, when used as a fuel for applications such as light duty vehicles and stationary power. These...

Proceedings of the 4th Annual Asia Pacific Conference on Transportation and the Environment This paper describes the on-going Hydrogen Infrastructure Transition (HIT) modeling efforts with the Beijing case study. HIT uses dynamic programming to generate optimal decisions on when, where, at what...

Intelligent Transportation Systems (ITS) show great potential for improving transportation system efficiency for users and system operators. Over the past decade, ITS technologies have been deployed in every major U.S. metropolitan area, on rural highways, and in smaller cities. However,...

Transportation is a major contributor of carbon dioxide (CO2) and other greenhouse gas emissions from human activity. It accounts for approximately 14% of total anthropogenic emissions globally and about 27% in the United States. Growing concern regarding the impacts of climate change and...