PATH

Moving Slot Concept for Automated Highway Control

Chin, Chi-nan
Hall, Randolf
2004

The objective of this report is to optimize performance of AutomatedHighway Systems through management of space accounting for interaction between entrance and exit processes. To accomplish this objective, we develop acomprehensive framework, including a new integrated highway model called the moving slot model, and operational strategies, called slot/lane assignment rules. Themodel manages highway space to maximize capacity accounting for safety and vehicle maneuvers. Operational strategies minimize space requirements by formingvehicles into specific patterns of destinations through entry...

ITS Standards: A System Management Perspective

Intihar, Chris
Hall, Randolf
1997

This working paper is part of a larger project examining how the State of California should respond to the National System Architecture (NSA) for Intelligent Transportation Systems. The specific focus of this paper is on the role of standardization in managing and controlling the transportation system. The paper reviews activities and processes used by standards setting organization in transportation. We conclude that national and international standards will continue to address the needs for defining common interfaces...

Decision Support And Consensus Building For PLANiTS

Kanafani, Adib
Crotty, Melanie
1993

This paper describes the specifications and the determinants for inclusion of a deliberative process to support intelligent transportation planning. Specifications for a system suitable for transportation planning have been defined, as have the determinants of a prototype for inclusion in early versions of an intelligent transportation planning process. The PLANiTS ( Planning and Analysis to Integrate Intelligent Urban Transportation Systems) framework is utilized in this project.

Travinfo Evaluation Plan

Yim, Youngbin
Khattak, Asad
Miller, Mark
Hall, Randolf
1993

This document presents an evaluation plan for the TravInfo project, a field operational test of a centralized database in the San Francisco Bay Area. The TravInfo Evaluation Plan is prepared in accordance with the Mitre guidelines adopted by the Federal Highway Administration (FHWA) for IVHS Operational Test Evaluation Plans. The report consists of five major sections: introduction, traveler response component, institutional component, technology assessment, and system evaluation.

User Response to the Telephone Advisory Traveler Information System in the San Francisco Bay Area: Based on TravInfo Caller Survey Wave 1

Ygnace, Jean-Luc
Koo, Ronald
Yim, Youngbin
2000

This paper presents the findings of a survey conducted among callers of a San Francisco BayArea telephone information service. A Bay Area traveler information system, TravInfo, has beenin operation since September 1996. In April 1997, a survey of TravInfo callers was conductedover a two-week period. The paper compares the call making and demographic characteristics ofthose who asked for traffic information and of those who asked for transit information. Changesin travel behavior after the calls were made were also investigated. The key findings of the studywere that the people who called...

Investigation of Vehicles as Probes Using Global Positioning System and Cellular Phone Tracking: Field Operational Test

Yim, Y. B. Youngbin
Cayford, Randall
2001

This paper reports on the first phase of the location technology evaluation for probe vehicles. Two technologies were evaluated, Global Positioning Systems (GPS) and the cellular phone tracking technology developed by US Wireless. Although GPS has shown great potential for vehicle probes, much of the previous research is theoretical in nature. Very little work has been done in the areas of experimental research, implementation or deployment. Most of the field tests were anecdotal; a systematic approach is highly desired to develop a vehicle probe system that is reliable and efficient for...

Organizing For Its: Computer Integrated Transportation Phase 2: Results For Commercial Vehicle Operators

Hall, Randolf
Chatterjee, Indrajit
1995

This paper extends previous research on Computer Integrated Transportation (CIT) to commercial vehicle operations (CVO), specifically to examine how government can work with trucking companies within a CIT framework. The research entailed a review of how government currently interacts with trucking companies, interviews with trucking terminal managers, and case-studies on terminal operations at five of the nation's largest motor carriers. Opportunities are identified in the area of unifying interaction between government and industry and in the area of in- vehicle devices for automated...

Automated-Manual Transitions: Human Capabilities and Adaptive Cruise Control

Barton, Joseph E.
Cohn, Theodore E.
Nguyen, Khoi M.
Nguyen, Tieuvi
Toyofuku, Natsuko
2004

ITS innovations in California are likely to include automated systems for vehicle guidance. Such systems will supplant manual controls during certain types of vehicle operation. However, the alternative manual control must remain intact in the vehicle. Thus, epochs of automated-manual transition (A-MT) are inevitable. The problem is how to characterize a given transition type and then how to optimize it. In this study we examined one of the several predictable transitions that use of the Adaptive Cruise Control (ACC) will lead to. This predictable A-MT is the event that would ensue when a...

Optimizing Comprehension of Changeable Message Signs (CMS)

Greenhouse, Daniel
2007

The goal of this research was to assist the California Department of Transportation (DOT) in optimizing the message content and presentation within changeable message signs (CMS). Optimized content will improve information transfer while at the same time minimizing the likelihood of congestion owing to slowing by motorists attempting to read the message. The research was restricted to simulated signs displaying 16 characters in each of three lines, representing permanent CMS displays, or signs containing only 8 characters in each of three lines, as is the case for portable CMS displays....

Berkeley Highway Laboratory Project: Final Report

May, Dolf
Cayford, Randall
Leiman, Lannon
Merritt, Greg
2005

This document is the final report for the 2004-2005 Berkeley Highway Laboratory (BHL) Project that is part of the University of California’s PATH program and supported by the California Department of Transportation (Caltrans). The primary objectives of this project have been to operate, maintain, enhance, and conduct research on the Berkeley Highway Laboratory (BHL) detector system. The project consists of following seven major tasks.Task 1, Macroscopic Freeway Traffic Performance MeasuresTask 2, Assessment and Improvements of Detector DiagnosticsTask 3, Installation and Testing of New BHL...