This paper reports on the culmination of a two year project to facilitate “smart growth” planning in the Las Vegas, Nevada metropolitan area. Using a group model building process, representatives of key municipal entities and resource management agencies developed a model for examining the potential effects of changes in land use and transportation planning on air quality, traffic congestion, a...

This study examines the cross-sectional associations between personal and perceived neighborhood environment attributes regarding walking for recreation and transportation among older Taiwanese adults. Data related to personal factors, perceived environmental factors, and time spent engaging in transportation-related and recreational walking were obtained from 1032 older adults aged 65 years an...

This paper explores whether and to what extent wind discourages sustainable transportation mode choice, which includes riding public transportation, bicycling, and walking. A six month-long field study was carried out at four locations in San Francisco, a city that has been promoting sustainable transportation mode choice but that experiences high wind levels. It involved surveying pedestrians ...

The future of air transportation modeling and simulation represents a grand challenge for both the air transportation and the modeling and simulation communities. In addition to its size and scope, air transportation has many technical, operational, organizational, policy, security and legal aspects contributing to its complexity, yet must ensure an un-rivaled level of safety throughout any tra...

Hydrogen has emerged as a possible transportation fuel for addressing long-term, sustainable energy supply, security, and environmental problems. Yet, there are a number of barriers that need to be overcome if hydrogen vehicles are ever to penetrate transportation markets, not the least of which is the development of a vehicle–infrastructure system. Hydrogen vehicles and refueling infrastructur...

Given the impact of transportation costs on both supplier selection and inventory replenishment decisions in today’s enterprises, this article addresses both problems simultaneously by proposing a mixed integer nonlinear programming model to properly allocate order quantities to the selected set of suppliers while taking into account the purchasing, holding and transportation costs under suppli...

Abstract Hydrogen has been widely touted as a solution to the looming crisis of energy security and climate change. Hydrogen in fuel cells can be used to power vehicles with the emission of only water. Providing hydrogen on a national scale in the United States, however, will be difficult. Hydrogen for transportation would require an enormous change in America's infrastructure, with a need to b...

This study discusses a decision support framework that guides policy makers in their strategic transportation related decisions by using multi-methodology. For this purpose, a methodology for analyzing the effects of transportation policies on environment, society, economy, and energy is proposed. In the proposed methodology, a three-stage problem structuring model is developed. Initially, expe...

Transportation has historically had a major influence on cities their locations, growth and form. Civil engineers were the leading public servants in construction of railway and transit systems. With diversification of transportation and, particularly, growth of highways, the solutions to urban transportation have become extremely complex. Instead of only building new facilities, it is now nece...