Infrastructure

I-880 Corridor Management Plan Demonstration

West, Thomas
2010

It is clear that transportation infrastructure expansion will continue to fall behind the pace of demand. If conditions are to improve, or at least not deteriorate as fast, a new approach to transportation decision making and investing is needed. The Corridor system Management Plan for the Nimitz (I-880) Freeway corridor in the Bay Area is a “first cut” template that integrates the overall concept of system management into Caltrans’ planning and decision-making process.

Cross-Sectoral and Multiscalar Exposure Assessment to Advance Climate Adaptation Policy: The Case of Future Coastal Flooding of California’s Airports

Lindbergh, S.
Ju, Y.
He, Y.
Radke, J.
Rakas, J.
2022

Climate adaptation is inevitable to managing the climate risk of infrastructure systems and has become an emerging topic in the past decade. Despite the growing need for collaborative and multi-agency efforts in climate change adaptation, however, current airport and transportation governance structures reinforce siloed approaches to manage climate risk. Here we combine a novel coastal flooding exposure assessment of California’s airports and a policy review to address the importance of collaborative climate adaptation by viewing airport infrastructures as interconnected systems across...

Bridge Congestion Pricing Still on Hold

Frick. K. T.
Heminger, S.
Dittmar, H.
1996

In an effort to address San Francisco-Oakland traffic congestion, the Bay Area Congestion Pricing Task Force examined the viability of variable tolls on the Bay Bridge. Tolls would be higher during peak commute hours when demand is highest, and lower when the bridge has excess capacity. This is known as congestion pricing. Interest in congestion pricing escalated because ISTEA authorized up to five congestion-pricing pilot projects to monitor the application and impact of pricing strategies on facilities. The Bay Area's proposal for the Bay Bridge was the first ISTEA project selected...

Magnetometer/GPS/INS Demo 2002 Support and Mitigation of GPS Signal Blockage Research

Farrell, Jay
2004

This project is concerned with accurately and reliably determining the state of a vehicle relative to a specified trajectory (e.g., a lane centerline). We are utilizing inertial navigation methods based on inexpensive solid state inertial sensors aided by external sensors such as carrier phase differential GPS, magnetometers, and roadway height. Due to this integration of sensors, reliability is increased relative to a single sensor approach and the changes required to the roadway infrastructure may be significantly decreased. This projects objectives included preparation for and...

Preparing the Way for Vehicle-Infrastructure Integration

Shladover, Steven E.
2005

Vehicle-Infrastructure Integration (VII) is one of the most important new national programs within the field of ITS, but until now it has been treated at the federal level as a deployment-oriented activity, without significant research elements. This report identifies some key research issues that need to be investigated in support of VII, in order to ensure that the VII concept and designs are as efficient and effective as possible and in order to produce the essential knowledge base that public agencies throughout the country can rely upon to make well-informed decisions about...

Stage Definition for AHS Deployment and an AHS Evolutionary Scenario

Tsao, H. S. Jacob
1996

This paper proposes an approach to defining evolutionary scenarios for the deployment of an Automated Highway System (AHS). Six dimensions of deployment difficulties are identified: technology, infrastructure, human factors, vehicle manufacturing and maintenance, insurance, and public will.

California Intersection Decision Support: A Systems Approach to Achieve Nationally Interoperable Solutions II

Misener, James A.
Chan, Ching-Yao
Cody, Delphine
Dickey, Susan
Nowakowski, Christopher
Greenhouse, Dan
Ragland, David
Shladover, Steven E.
Vanderwerf, Joel
2007

The overall IDS research plan was constructed to realize, in slightly more than three years, the requirements, tradeoffs assessment, and technology investigations necessary to define an IDS. Toward the end of the project we will combine our understanding of the problem definition, IDS technologies and our integration experience with a standard Caltrans intersection (with advanced controller) and design a deployable IDS demonstration that can be field-tested.With the availability of sensing, communication, and computing technologies, IDS systems are promising for the reduction of crashes,...

Vehicle Control Design for Infrastructure Managed Vehicle Following

Raza, H.
Ioannou, P.
1996

The purpose of this paper is to design and test a vehicle control system in order to achieve full vehicle automation in the longitudinal direction for several modes of operation, where the infrastructure manages the vehicle following. A supervisory controller is designed to provide the required intelligence for the modes. The controller process input and sends the appropriate commands to the brake and throttle controllers. It makes decisions about normal, emergency and transition operations so that the resulting motion of vehicle is safe and follows Automated Highway System (AHS)...

Cooperative Adaptive Cruise Control: Testing Drivers’ Choices of Following Distances

Nowakowski, Christopher
Shladover, Steven E.
Cody, Delphine
Bu, Fanping
O'Connell, Jessica
Spring, John
Dickey, Susan
Nelson, David
2011

A Cooperative Adaptive Cruise Control (CACC) system has been developed by adding a wireless vehicle-vehicle communication system and new control logic to an existing commercially available adaptive cruise control (ACC) system. The CACC is intended to enhance the vehicle-following capabilities of ACC so that drivers will be comfortable using it at shorter vehicle-following gaps than ACC. This can offer a significant opportunity to increase traffic flow density and efficiency without compromising safety or expanding roadway infrastructure.This report describes the design and implementation...

The State of Cellular Probes

Yim, Youngbin
2003

Cellular probe technology is one of several potentially promising technologies for obtaining accurate travel time information. In 1996, the Federal Communications Commission (FCC) mandated E911 requirements that cellular location be provided when 911 emergency calls come in to emergency management authorities. The E911 requirements allow 50 -300 meters from the emergency call location, depending on the type of cellular phone technology used and whether handset-based or network-based solutions are deployed. This paper investigates the current state of cellular probe technologies. Recent...