Intelligent Transportation Systems

Steady State Conditions on Automated Highways

del Castillo, Jose M.
Lovell, David J.
Daganzo, Carlos F.
1995

This paper is concerned with technical investigations of traffic operations on automated highways. Estimates are made of the steady-state capacity of such freeways, paying particular attention to the effect of entry and exit maneuvers. The possibility of scheduling departing vehicles appropriately into platoons to minimize extraneous maneuvers is investigated. Characteristics of urban areas likely to be candidates for automated freeways are discussed, and some shortcomings of automated freeways, vis-à-vis conventional freeways, are pointed out. Finally, some areas of future research needs...

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.

Summary of Selected, Significant ITS and ITS-related Policies and Programs in Europe and the US (with Japan Supplement)

Conroy, Pat
Ygnace, Jean-Luc
2002

This research project explored institutional and organizational factors contributing to successful deployment of Intelligent Transportation Systems (ITS). The researchers conducted a comprehensive internet/literature search on the status of ITS programs in Europe and the U.S., interviewed principals involved in ITS deployment both at the policy and project levels, and from the public and private sectors, and developed four case studies of successful ITS deployment. Results from the internet/literature search and responses from the survey/interviews were analyzed to identify critical...

Decision Support Systems for Managing and Applying ITS Resarch

Dahlgren, Joy
Al Kadri, Mohamed
Picado, Rosella
1998

This study is presented in three related papers. The first develops a structurefor making decisions regarding Caltrans/PATH research. It describes aresearch cycle in which real world needs and opportunities fed into a processby which research priorities are set, proposals invited, and projects areselected. These research projects ultimately provide information that can beused for further research or for implementation. Implementation changessociety and technology and leads to new needs and opportunities, which inturn feed into the research process. The second paper develops and...

Users’ Guide and Design Description SmartPath Simulator - Version MOU62

Hongola, Bruce
Tsao, Jacob
Hall, Randolph
1993

This document contains the user instructions and software design description for Version MOU62 of the SmartPath Simulator. The baseline version of the simulator including user instructions is described in [l].

TMDD Standards Update Recommendations – Data and System Security

Peterson, Brian
2022

This document provides recommendations for modifications to the current TMDD standard. Its goal is to provide a foundation for modernizing the standard. This document specifically provides recommendations for implementing this project’s gap analysis recommendations related to providing security guidance for each approved transmission protocol. Included in this document are recommendations related to a new volume of the specification dealing with minimum security requirements and security recommendations for each data transmission protocol.

A Time Headway Autonomous Intelligent Cruise Controller: Design and Simulation

Ioannou, P.A.
Ahmed-Zaid, F.
Wuh, D.H.
1994

Autonomous Intelligent Cruise Control (AICC) design is an important part of Advanced Vehicle Control Systems (AVCS). In this report, we design an AICC scheme for vehicle following with constant time headway spacing. The scheme maintains a steadystate inter-vehicle spacing decided by a desired time headway set by the driver. The longitudinal model of the Lincoln Town Car is used for simulations and testing. The vehicle is assumed to be equipped with a relative distance and speed measuring sensor,as well as an absolute speed measuring device.

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.

Effects of Traffic Density on Communication Requirements for Cooperative Intersection Collision Avoidance Systems (CICAS)

Shladover, Steven E.
2005

Intersection collisions are difficult to mitigate or eliminate by use of ITS technologies for a variety of reasons. These include the complexity of the driving environment and of the driver decision making process at intersections, but also the difficulty of accurately detecting the movements of all potentially conflicting vehicles. Prior research by Calspan-Veridian Engineering (now part of General Dynamics) (1) showed the near impossibility of detecting the relevant information using vehicle-mounted sensor systems. Current research under the IDS program is revealing the challenges...

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...