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...

This project conceptually and empirically explores the complex relationships between congestion and accessibility. While congestion alters individual access to opportunities, its effects vary significantly across people, places, and time- variations that reaming relatively understudied. This...

Behind all debates over the adequacy of highway revenues lies the tricky issue of how much money states and the federal government ought to spend on highways. States and the federal government have historically tried to determine revenue needs with technical reports known as "needs...

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...

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...

Since 1923 motor fuel taxes have been the principal instrument by which revenues are raised for the construction and maintenance of the California highway system. Fuel taxes are distinguished from most other taxes because they have been conceived of as a “user fee†rather than as a...

Freight transportation plays a vital role in the economy of the nation and the state of California in particular. The value of total freight shipments originating in California in 1997 is estimated $638.5 billion, 10.6 percent of all US shipments by value. This represents 706.5 million tons of...

Modern panel surveys frequently suffer from high and likely non-ignorable attrition, and transportation surveys suffer from poor travel time estimates. This paper examines new methods for adjusting forecasts and model estimates to account for these problems. The methods we describe are...

Efficient maritime transportation is heavily dependent on the smooth operation of land transportation. Swift modal transfers are key to successful intermodal operations. In this paper we examine the efficiency of maritime intermodal transfer facilities in California, from the point of view of...