Population growth, continuing suburbanization, and higher labor-force-participation rates, combined with a virtual halt in new freeway construction, have led to rapid increases in traffic congestion in the U.S. This congestion is costly, for example, the cost of highway congestion in the Lose...

Cities often opt for rail transit even when agency evaluations conclude that other alternatives are superior in performance and efficiency. The choice of light rail transit (LRT) in Sacramento, California serves as a case study. When adjustments are made for overstated assumptions and irregular...

Hydrogen is an especially attractive transportation fuel. It is the least polluting fuel available, and can be produced anywhere there is water and a clean source of electricity. A fuel cycle in which hydrogen is produced by solar-electrolysis of water, or by gasification of renewably grown...

A solution to growing petroleum imports and continuing urban air-pollution problems is the use of clean-burning nonpetroleum fuels in motor vehicles. Methanol is widely viewed as the most attractive candidate for transportation fuel of the future. We examine how methanol gained this preeminent...

Transportation energy issues are moving to the forefront of the public consciousness in the U.S. and particularly California, and gaining increasing attention from legislators and regulators. The three principal concerns motivating interest in transportation energy are urban air quality, oil...

Electric vehicles (EV) are periodically promoted as quiet, pollution-free alternatives to gasoline vehicles. They have failed each time because of inferior performance and high costs. In this paper, we conduct an updated and detailed evaluation of the performance, costs, environmental impacts,...

Alternative vehicular fuels are proposed as a strategy to reduce urban air pollution. In this paper, we analyze the emission impacts of electric vehicles in California for two target years, 1995 and 2010. We consider a range of assumptions regarding electricity consumption of electric vehicles,...

Various problems in the regional modeling of ITS are discussed. We then review previous research on the effects of ITS highway and transit technologies on travel and emissions, and critique these studies. Then, we outline our past research methods and findings and describe the weaknesses of...

This study demonstrates the sequential linking of two types of models to permit the comprehensive evaluation of regional transportation and land use policies. First, we operate an integrated urban model (TRANUS), which represents both land and travel markets with zones and networks. The travel...

Using census block groups data on socio-demographics, land use, and travel behavior, we test the cutoffs suggested in the literature for trustworthy estimates and hypothesis testing statistics, and evaluate the efficacy of deleting observations as an approach to improving multivariate normality,...