Infrastructure

The San Francisco–Oakland Bay Bridge is located in the heart of the San Francisco Bay Area in California and connects two of the largest cities in northern California over San Francisco Bay. In July 2010, the Bay Area Toll Authority (BATA) increased tolls on the San Francisco–Oakland Bay Bridge from a flat toll collected westbound only to weekday peak and off-peak tolls. BATA also instituted a carpool toll of $2.50 (previously carpools crossed for free) payable by FasTrak electronic toll collection tag only. With floating-car data provided by BATA, the change in travel time for the I-80, I...

This guide presents a rational approach for identifying traffic control strategies for mitigating oversaturated conditions at signalized intersections. The guide discusses the following components of the rational approach: diagnosis of the type and causes of the oversaturated condition; identification of appropriate operational objective(s) based on the observed condition(s); identification of appropriate strategies to address the situation; and identification of any necessary infrastructure, equipment, or software requirements for each strategy. The intended audience for this guide is a...

While transportation funding can be collected in a variety of direct (e.g., fares, tolls, and gas taxes) or indirect (e.g., property and sales tax) ways, dynamic demand responsive pricing not only collects revenue but also incentivizes travelers to avoid peak-demand periods, thus utilizing infrastructure capacity more efficiently. Unfortunately, the demand response to price changes, called the price elasticity of demand, is generally greater for longer-term travel planning (e.g., air and rail travel) than it is for more atomized short-term planning (e.g., highway tolls and transit fares)....

The California Partners for Advanced Transit and Highways (PATH) has been active in researching vehicle-roadside cooperation since 1988. Through the years PATH's work in automation has spawned a considerable body of research in related topics of safety and vehicle-infrastructure cooperation. These topics are summarized by exemplar projects in areas of heavy vehicle driver assistance, cooperative forward collision avoidance, intersection safety and vehicle-infrastructure integration. While this review is by no means comprehensive, it illustrates the past, present and future of PATH and...