Employment and the journey to work have long been a focus of transportation study. Although today, the work trip accounts for a much smaller share of total trips than it did a few decades ago, there are several reasons why this subject deserves our continued attention. In planning for the...

Many cities in the United States are facing challenges associated with antiquated urban arterials, whose purpose has changed greatly since their development. Once considered the main streets of the city, with thriving businesses and attractive residential development, many have deteriorated over...

Transportation is rapidly being changed by new technologies, such as Intelligent Transportation Systems (including smart cards, on-board diagnostics and information systems, and smarter highways, transit, automobiles, logistics systems, and other information systems). The range of options and...

Many sources provide good information on Intelligent Transportation Systems concepts and applications. However, some of these sources are highly technical and others are lengthy treatments of the subject. The summaries presented here are designed for the busy, non-technical reader who: wants to...

This paper presents key statistics and trends in freight transportation in the United States and California. While California is obviously a large and integral part of the national economy, there are many important differences in shipment patterns between the state and the nation as a whole....

Electronics and telecommunications are rapidly changing and are having significant impacts on social and economic activity, with major implications for transportation. Location of businesses and households may be altered as telecommunications options improve. Already, there is evidence that...

The Loma Prieta earthquake of October 1989 damaged highways throughout the Bay Area. For many of the damaged facilities, parallel routes or minor detours provided reasonable alternatives and were quickly put to use by travelers. Although congestion and travel time increased, the alternative...

Significant accomplishments in air pollution emissions control have occurred over the past twenty years. Emissions have been substantially reduced by both industrial and transportation sources; over the ten year period 1977-86, the U.S. Environmental Protection Agency (EPA) reports improvements...