Intelligent Transportation Systems

TravInfo Evaluation: Traveler Response Element Willingness to Pay for Traveler Information: Analysis of Wave 2 Broad Area Survey

Wolinetz, Louis
Khattak, Asad J.
Yim, Youngbin
2001

TravInfo is a Field Operational Test (FOT) sponsored by the Federal Highway Administration (FHWA) and California Department of Transportation. It aimed to develop a multi-modal traveler information system for the San Francisco Bay Area, combining public and private sector talents. The Broad Area Study is part of the TravInfo FOT evaluation. This paper addresses issues on the willingness to pay for traveler information. Two waves of telephone surveys of Bay Area households were conducted, one prior to and one after the Field Operational Test. The initial survey was conducted in November...

A Survey of Value Added Resellers: Private Sector Views on Advanced Traveler Information Markets

Ygnace, Jean-Luc
Yim, Youngbin
Weissenberger, Stein
1997

This is a case study of publidprivate partnerships for the implementation of TravInfo, an advanced traveler information system for the San Francisco Bay Area. The purpose of the paper is to illuminate private sector views on how the public/private partnership should work in order to successfilly implement TravInfo. This paper reports on the analysis of a series of interviews conducted among those private sector firms who are participating in the federal Field Operational Test of TravInfo. The firms interviewed range from product manufacturers to service providers, including traffic...

Design, Modeling And Control Of Steering And Braking For An Urban Electric Vehicle

Maciua, Dragos
1996

This report describes research which involved the design modification, modeling and control of automatic steering and braking systems for an urban electric vehicle. The vehicle is equipped with four-wheel independent drive, four-wheel independent braking and four-wheel steering. Control algorithms were developed for steering and braking. Simulation results show the feasibility of the algorithms.

Trav Info Evaluation (Technology Element ) Traveler Information Center (TIC) Study: System Reliability and Communications Interface

Miller, Mark
Loukakos, Dimitri
1998

TravInfo is a Field Operational Test of advanced traveler information systems for the San Francisco Bay Area, sponsored by the Federal Highway Administration (FHWA). The project involves a public/private partnership which seeks to compile, integrate and broadly disseminate timely and accurate multi-modal traveler information through commercial products and services. The public sector component centers on the Traveler Information Center (TIC), which collects and integrates both static and dynamic traveler information. The TIC began operations in September 1996 and will operate as an FOT...

Initial Scoping of Bay Area Smart Mobility Corridors and ITS World Congress

Shaheen, Susan
Finson, Rachel S.
McCormick, Cynthia
2004

The Innovative Corridors Initiative (ICI) is a multi-year project designed to encourage the early deployment of innovative technologies for Intelligent Transportation Systems (ITS) in California. ITS technologies are defined through a broad array of information and vehicle control technologies that are designed to improve traffic and transit management including safety, user choice, congestion, and incident response. For over a decade, ITS technologies have been gaining acceptance and are now utilized in every major metropolitan area in the United States to enhance transportation system...

Development Of User Needs And Functional Requirements For A Real-time Ridesharing System

Kowshik, Raghu
Gard, John
Loo, Jason
Jovanis, Paul P.
Kitamura, Ryiuichi
1993

This report documents the results of a user needs assessment conducted to define the concept of real-time ridesharing, and identify the problems that are to be addressed by the proposed Real-Time Rideshare Matching System. The user needs are then utilized to develop functional requirements for the real-time rideshare matching system. The functional requirements identify services that should be provided by the system, and the interfaces to be used to access the system.

Vehicle Reidentification and Travel Measurements on Congested Freeways

Coifman, Benjamin
1999

This paper presents a vehicle reidentification algorithm for consecutive detector stations on a freeway, whereby a vehicle measurement made at a downstream detector station is matched with the vehicle's corresponding measurement at an upstream station. The method is illustrated using measured vehicle lengths from paired loop detector speed traps. Where speed traps are quite common, often placed at half mile spacings or less on urban freeways. In conventional operation, these detectors only monitor traffic conditions over the loops, leaving most of the freeway unmonitored. By taking the...

Robust Automatic Steering Control for Look-Down Reference Systems with Front and Rear Sensors

Guldner, Jurgen
Sienel, Wolfgang
Tan, Han-Shue
Ackerman, Jurgen
Patwardhan, Satyajit
Bunte, Tilman
1997

This paper describes a robust control design for automatic steering of passenger cars. Previous studies [l-3] showed that' reliable automatic driving at highway speed may not be achieved under practical conditions with look-down reference systems which use only one sensor at the front bumper to measure the lateral displacement of the vehicle from the lane reference. An additional lateral displacement. sensor is added here at the tail bumper to solve the automatic steering control problem. The control design is performed stepwise: First, an initial controller is determined using the...

Investigation Of An Optical Method To Determine The Presence Of Ice On Road Surfaces

Misener, James
1998

This report presents a review of alternative techniques to determine the presence of ice on road surfaces. It examines techniques ranging from passive, in-pavement technologies, to different remote sensing techniques. The author presents the Polarized Reflectance Infrared Signature Method (PRISM) technique which uses differences in measured near infrared reflectance between ice, water and dry road due to absorption, in addition to the effect of polarization to discount the contribution of specutacular reflectance off the front surface.

Implementing A Dynamic O-D Estimation Algorithm within the Microscopic Traffic Simulator Paramics

Garcia, Reinaldo C.
2002

California has long recognized the potential for applying electronic and other transportation systems technologies to address the significant mobility and economic challenges in the state,and the rest of the nation.Through an aggressive Advanced Transportation Systems Program,Intelligent Transportation Systems (ITS)are being researched,built,and tested for deployment.These ITS will address today s transportation needs and those of the twenty-first century.An important element of this program is the California Advanced Transportation Management Systems Testbed (California ATMS Testbed)...