Roads/Highways

Experimental Studies on High Speed Vehicle Steering Control with Magnetic Marker Referencing System

Tan, Han-Shue
Bougler, Bndicte
2000

This project is a one-and-half year research and experimental effort that builds on the results of as well as supplements the efforts in MOU 250, "Experimental Studies on Vehicle Control Systems." It focuses on an emerging issue of the high-speed steering control: how to conduct robust automatic vehicle steering control at highway speed based on a look-down lateral sensing system.

Automated Highway Systems Operating Strategies and Events: A Driver’s Perspective

Tsao, H.-S. Jacob
Hall, Randolph
Shladover, Steven
1997

Automated Highway Systems (AHS) have the potential for offering large capacity and safety gains without requiring significant amounts of additional right-of-way. Since the general public will be the users of the AHS, human factors must play a pivotal role in the research and development of AVCS technologies and AHS operation. This paper focuses on fully automated AHS.To ensure the identification of all major human factors issues, we have identified major options for operating fully automated AHS. These options are categorized in the following four dimensions: separation of traffic,...

California System Architecture For Intelligent Transportation: Models For Transportation Systems Management

Hall, Randolph
Thakker, Viral
1998

In 1996, the Federal Highway Administration completed a program to develop a national system architecture (NSA) for intelligent-transportation-systems. This report presents recommendations on methodologies by which system architecture can be used to improve the deployment of transportation management projects, with emphasis on multi-jurisdictional projects. The report is part of a larger project addressing the deployment of an ITS system architecture in California. The project as a whole is led by Claremont Graduate School, and is documented in a separate report.

Configuration And Maneuvers In Safety-consciously Designed Ahs Configuration

Hitchcock, Anthony
1995

This paper sets out a configuration for an Automated Highway System (AHS) which is believed to have advantages from a safety viewpoint. The configuration and operating principles are described. The scheme requires that vehicles change lanes directly from platoon to platoon, and that entry and exit be made also without platoons merging or splitting on the automated lanes. The protocols for the maneuvers needed are described in detail.

Travinfo Evalution (technology Element) Traveler Information Center (tic) Study (september 1996 - June 1997)

Miller, Mark A.
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...

Travinfo Field Operational Test Evaluation Plan

Hall, Randolph
Yim, Y. B.
Khattak, Asad
Miller, Mark
Weissenberger, Stein
1995

TravInfo is a Field Operational Test (FOT) sponsored by the U.S. Federal Highway Administration. The goal of the project is to implement a centralized traveler information center to collect, integrate, and broadly disseminate timely and accurate traveler information in the San Francisco Bay Area. This evaluation plan describes the scope, methods, and procedures to measure the effectiveness of the project. The TravInfo evaluation will contain four evaluation elements: institutional, technology, traveler response, and network performance.

Some Aspects of the Market for Broadcast Traffic Information

Malchow, Matthew
Kanafani, Adib
1999

In recent years, planners have looked toward traffic information systems as an immediate solution to the congestion on U.S. highways. ITS systems are low-cost relative to many alternatives, and simple implementation allows for quick results. Alongside these investments has been research investigating the use of information systems by drivers and the results to be expected. Many studies have shown that the primary source of information for drivers has been broadcast systems such as the radio (e.g. Yim et al., 1997). Additional research has addressed other media which are used to transmit...

Freeway Detector Data Analysis For Simulation Of The Santa Monica Freeway - Summary Report

Bloomberg, Loren D.
May, Adolf D.
1993

The objective of this study is to collect, organize, analyze, and summarize available detector data for the Santa Monica Freeway. The primary goal is to develop on/off ramp counts as input to a synthetic origin/destination model; mainline freeways counts are also needed. Strategies for synthesizing data from stations where current detector data are unavailable are also considered. This report is a revised version of UCB-ITS-PWP-93-1 (PATH Database record #4079)

Advanced Simulation Tools for Freeway Corridor Management

Gardes, Yonnel;
Tang, Eric
Ma, Jingtao
May, Adolf D.
2003

As part of the California PATH program, the Paramics microscopic traffic simulation model was applied to the I-580 freeway-arterial corridor. The main purposes of the project were two-fold:- Develop the expertise and transfer the knowledge required in calibrating a large-scale freeway corridor with Paramics;- Prepare a calibrated model for the I-580 corridor that could be used to address operational questions, evaluate potential improvement alternatives and provide input to the decision-making process.In agreement with Caltrans District 4 and Headquarters, the study focused on the...

Systematic Design for Roadway Interfaces with Applications to Automated Highways

Hall, Randolph
2000

This report provides interim results on the design of interfaces between automated highways and conventional street systems. The purpose here is to identify the strategic issues in interface design, and to provide preliminary analysis on just one of these issues (separation between highway entrance and exits). Future research will explore a full set of strategic issues in greater depth. The central concept explored in this report is how to design a roadway system that comprises multiple layers, some of which are designed for the purpose of accessibility, and others of which are designed...