Older vehicles contribute a significant and disproportionate share of the pollution in urban areas. Starting in 1990, several areas adopted voluntary accelerated vehicle retirement (VAVR) programs to address this problem and to respond to demands for flexible, market-based approaches to...

The cost of building rail transit facilities in the United States has skyrocketed in recent decades. Sections of Los Angeles’s Red Line subway cost more than $750 million per mile to build and even less pricey light-rail systems can cost more than $200 million per mile. Soaring capital...

This paper considers residential segregation by race and by type of household in 1970 and 1980. The paper presents entropy indices of segregation for the San Francisco Bay Area and its five metropolitan areas. The methodology permits an investigation of the effects of group definition upon...

While transit-oriented development (TOD) has become an increasingly popular planning idea, very few studies have examined how localities plan for and implement transit-oriented projects. This paper helps fill that gap by studying the TOD implementation process near stations on the oldest of the...

We estimate how motorists value their time savings and characterize the degree of heterogeneity in these values by observable traits. We obtain these estimates by analyzing the choices that commuters make in a real market situation, where they are offered a free-flow alternative to congested...

The warming of the Earth’s temperature due to human activities, known as anthropogenic climate change, is a threat to the environment and human health. The transportation sector is a major contributor to anthropogenic climate change, being responsible for 27 percent of all domestic...

We investigate employment subcenters in the Los Angeles region using’1980 Census journey-towork data. A simple subcenter definition is used, based solely on gross employment density and total employment. We find a surprising dominance of downtown Los Angeles and three large subcenters...

Transportation planning research addresses accessibility from diverse approaches, focusing varyingly on the usability of the transportation system as a whole, a particular mode, the pattern of land uses, or the wherewithal of individuals and communities to make use of those systems. One...

Today’s teens are members of the first generation to have never known a world without instantaneous and nearly ubiquitous mobile phone access. They also must surmount greater hurdles to driver’s licensing than any previous generation faced. And they are struggling to transition...

The San Francisco Bay Area is blessed with one of the most extensive urban rail networks in the nation -- the 80-mile Bay Area Rapid Transit System, the 72-mile CalTrain commuter rail system, a new light-rail service in Santa Clara County, and streetcars, trams, and cable cars lacing the streets...