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...

Local area freight networks (LANs) are used to collect and distribute freight within metropolitan regions. Focusing on common carriers, this paper classifies LAN topologies, then shows how the optimal topology depends on demand characteristics. Continuous space approximations are used to analyze...

Underlying changes in demographics and travel are an important set of social and personal choices that determine behavior. California's reputation as a trendsetter for the rest of the nation in terms of social developments and public policy is primarily driven by the dynamic shifts in lifestyle...

Major investments in highway or transit infrastructure often require a decade or more to move from planning to completion. Therefore, a solid understanding of California's future transportation infrastructure needs implies a critical evaluation of the projections of the state's total population,...

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...

This paper presents an overview of a dozen trends that have potentially significant consequences for California and its transportation plan for the next twenty years. The twelve trends discussed in the paper are: 1. A Growing Population 2. Demographic Change 3. New Patterns of Employment 4....

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....

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...

A broad range of population forecasts and historic trends indicate that significant growth is on the horizon for California. Although population growth by geographic regions, racial/ethic groups, and age will vary, growth is a consistent trend. Naturally, growth in population implies growth in...

To better understand how road congestion adversely affects trucking operations, we surveyed approximately 1200 managers of all types of trucking companies operating in California. More than 80% of these managers consider traffic congestion on freeways and surface streets to be either a "somewhat...