We have been collaborating in a panel study of commuter behavior in southern California which has been running since winter 1990. We were interested in setting up a panel so that we could study the dynamics of commuting behavior, especially in a situation where the environment was changing...

Consider a consumer who can choose to travel on a congestible fast mode or on a congestible slow mode. Users who most value time will use the fast mode. A toll on the slow mode can induce some people who initially use that mode to switch to the fast mode. A toll on the slow mode with revenue not...

In the United States, federal funding for public transit often accounts for a large proportion of a local agency's budget, especially for capital investments. For this reason, local governments can be expected to plan a portfolio of projects that maximize federal contributions. This study...

Using two years of crash and average annual daily traffic data we examine the locations and conditions linked to truck-involved crashes (accidents). A binomial logit model is used to describe how the probability that a crash involves a truck is a function of the percentage of annual average...

1998 will be a big year for both automakers and clean-air advocates. In less than three years, the seven largest car sellers in California must sell zero-emission vehicles (ZEVs) - 2 percent of their sales of vehicles under 3750 lbs loaded weight. Given the size of the current market, that's...

Every year, Americans drivers spend hundreds of billions of dollars on highway transportation. They pay for vehicles, maintenance, repair, fuel, lubricants, tires, parts, insurance, parking, tolls, registration, fees, and other items. These expenditures buy Americans considerable personal...