Intelligent Transportation Systems

Measuring the Aggregate Productivity Benefits from ITS Applications: The California Experience

Gillen, David
Haynes, Matt
2000

This research provides the first evidence of whether and how ITS contributes to economic growth and productivity – an objective established by the California Transportation Plan and ITS in particular. The next set of questions includes, what industries are most affected by ITS applications? Does it matter how many ITS applications are present, in other words, are there diminishing returns to similar ITS projects? Finally, does it matter how ITS projects are combined? This latter question also arose out of our research on production functions as well, and will be a central part of the...

Advances in Fuzzy Logic Control for Lateral Vehicle Guidance

Hessburg, Thomas
Tomizuka, Masayoshi
1994

A candidate for intelligent control for lateral guidance of a vehicle is a fuzzy logic controller (FLC). The details of the most recent FLC with a rule base derived from heuristics and designer insight to the problem at hand, as well as a method for estimating a projected lateral displacement are presented along with simulation results. The structure of this FLC is suited to incorporate human knowledge about the steering operation by its choice of inputs and outputs of the FLC which are natural to human steering operation. In addition, a method that makes use of preview information...

Combined Brake and Steering Actuator for Automatic Vehicle Control

Prohaska, R.
Devlin, P.
1998

This report describes a combined steering and brake actuator system for use in automatic vehicle control research The system allows a standard passenger car to switch from normal manual operation to automatic operation and back in a seamless manner using largely standard parts. The system uses a constant flow actuator system which employs valves using standard constant-pressure spool valve bodies and custom spools. The technique minimizes the mechanical disruption to the vehicle and also allows a smooth transmission between modes.

Evaluation Methods for Measuring the Value of ITS Services and Benefits from Implementation: Part X Freeway Service Patrols

Levinson, David
Parthasarathi, Pavithra Kandadai
2001

The goal of our report is to determine the value that people place on the benefits offered by freeway service patrols in comparison to private assistance services and how much they would be willing to pay to avoid being stranded when their vehicle breaks down on the freeway. The report investigates the factors that contribute to people choosing to rely on the highway assistance services in comparison to the private assistance services. The studies conducted so far have focused on the effectiveness of the freeway service patrol whereas this report analyzes the factors that influence people...

Video-based Vehicle Signature Analysis and Tracking System Phase 2: Algorithm Development and Preliminary Testing

MacCarley, Arthur C.
2001

This report describes the results of the PATH/Caltrans-funded project Video-Base Signature Analysis and Tracking (V2SAT) System, Phase 2 Algorithm Development and Preliminary Testing. The V2SATSystem was conceived in 1995 by Loragen Systems, of San Luis Obispo, California, as a means for non-intrusively tracking individual vehicles on freeways for data collection purposes. The concept involves the use of computer vision methods to make simple optical measurements on digitized real-time images of each vehicle on the freeway. A conventional color video camera serves as the primary sensor....

Single-channel IVHS Communication Architecture

Linnartz, Jean-paul M. G.
1994

This report documents a single-channel architecture offering two-way communication between vehicles and a fixed communication infrastructure. Part I discusses the technical advantages and disadvantages of a dedicated Intelligent Vehicle Highway Systems (IVHS) communications infrastructure versus the use of a hybrid system involving several existing communication networks. Aspects such as spectrum efficiency, message capacity, and network performance are described. Part II proposes a network architecture that offers several transmission services essential to IVHS communications, using only...

Highway Electrification: An Exploration of Energy Supply Implications

Wang, Quanlu
Sperling, Daniel
1987

The objective of this preliminary report is to explore the energy supply opportunities and implications of electrifying highways. An important assumption in this report is that the technology and general cost structure for generating and storing electricity does not change significantly in the future. In other words, we ignore the possible use of super conductive materials to store electricity during off-peak times, which, if feasible, would greatly reduce average electricity costs. A future report will examine the opportunities and implications of breakthroughs in superconductivity.The...

Summary of Observations on July 1993 Study Tour to Japan

Orne, Donald E.
Shladover, Steven E.
1993

The purpose of this report is to document some lessons learned during the July 3-16, 1993 tour of Japan and Intelligent Vehicles ’93 Symposium attendance by PATH Director Donald E. Orne and Deputy Director/AVCS Program Manager Steven E. Shladover.The tour was arranged by PATH through Japanese contacts to coincide with the Intelligent Vehicles ’93 conference. Most of the contacts were known to PATH either from introductions at various conferences or by visits to PATH offices.Special attention was given by Orne and Shladover to consider the extent to which interaction with government,...

Custom Interface Builder Palettes For Advanced Driver Interface Rapid Prototyping

Moore, David W.
1993

This manual provides a brief introduction to four classes of software objects developed to help a user create and test interfaces using these objects in the Interface Builder application environment. The Knob, Dial, Alert Light, and Map object classes presented here represent the beginnings of a software library of virtual interface objects designed to support a rapid prototyping environment for advanced interfaces as described in "Rapid Prototyping of Advanced Driver Interface Systems."

Institutional, Organizational and Market Aspects of Successful ITS Deployment: A Case Study Analysis

Conroy, Patrick
2003

This research follows on a previous study to explore key aspects of successful Intelligent Transportation Systems (ITS) deployment within existing institutional, organizational and market environments. The researcher developed three additional case studies of successful ITS deployment in the U.S. and Europe, and revisited one case from the previous work. Results from literature searches and surveys were analyzed, and findings on institutional, organizational and market factors are presented. Key words: ITS, deployment, institutional, value, business models, benefits, highway capacity