PATH

Feasibility Study Of Advanced Technology Hov Systems: Volume 4: Implementation Of Lateral Control Systems In Transitways

Chira-chavala, Ted
Zhang, W. B.
Walker, J.
Javandel, F.
Demsetz, L.
1992

This study investigates issues concerning the implementation and impacts of lateral guidance/control systems and the phased implementation of these systems in exclusive-access High Occupancy Vehicle (HOV) lanes. The study is divided into 5 volumes. The objectives of each volume are as follows: Vol. 1: identify strategies for early deployment of longitudinal control technologies on the highway, and to evaluate potential impacts of these strategies on traffic operation, highway capacity, and traffic accidents. Vol. 2A: assess the feasibility of early deployment of Roadway Powered Electric...

Intelligent Cruise Control System Design Based on a Traffic Flow Specification

Swaroop, D.
Huandra, R.
1999

This paper investigates the problem of designing an Intelligent Cruise Control (ICC) algorithm for automated vehicles. An ICC algorithm, if implemented by every vehicle in the traffic, must guarantee that the density disturbances attenuate as they propagate up stream. Such a desirable property of the traffic is dependent on the spacing policy employed by automated vehicles and on the availability of information required to synthesize a string stable control law consistent with the employed spacing policy. The first part of the paper is concerned with the design of a spacing policy and the...

Integrated Roadway/Adaptive Cruise Control System: Safety, Performance, Environmental and Near Term Deployment Considerations

Ioannou, Petros
Wang, Yun
Chang, Hwan
2007

In this project, we present the design, analysis and performance evaluation of the Integrated Roadway/Adaptive Cruise Control System (IRAC) proposed in Task Order (TO) 4242 and studied further in the continuation of TO4242 under TO5501. The IRAC system is a highway traffic control system which integrates ramp metering strategies and a speed control strategy by taking into account highway to vehicle communication, and adaptive cruise control (ACC) system technologies on board of the vehicles. The IRAC system closes the loop of an almost open loop highway traffic system by controlling both...

Platoon Collision Dynamics And Emergency Maneuvering I: Reduced Order Modeling Of A Platoon For Dynamical Analysis

Tongue, Benson H.
Yang, Yean-tzong
White, Matthew T.
1991

The purpose of this three-year project is to develop an operational model of vehicle platoon dynamics under emergency conditions and to evaluate the platoon's dynamical behavior under non-nominal, or emergency, conditions. New platoon protocols and/or controller modifications will be formulated after analyzing the platoon response data in order to minimize damage to the platoon and the vehicles' occupants. This progress report discusses the results of the modeling phase of this work. A detailed literature review is included as Appendix B.

Using Cooperative Adaptive Cruise Control (CACC) to Form High-Performance Vehicle Streams. Microscopic Traffic Modeling

Liu, Hao
2018

This document summarizes the microscopic traffic simulation models used in the project entitled Using Cooperative Adaptive Cruise Control (CACC) to Form High-Performance Vehicle Streams. The major components of the microscopic traffic model include the vehicle dispatching model, human driver model and ACC/CACC model. The vehicle dispatching model determines how a modeled vehicle enters the simulation network and the distribution of different types of vehicles across the multi-lane highway. The human driver model and ACC/CACC model specify the car following and lane changing behaviors of...

A Mobile Platform for Roadway Incident Documentation

Su, Ray J.
Chan, Ching-Yao
2004

This report is part of the final report and the deliverables for TR0002, Collision Recording and Documentation, sponsored by California Office of Traffic Safety, and contracted through California Department of Transportation. Roadway incidents, especially collisions, often result in traffic congestion and travel delays, in addition to the direct damage to the vehicles and the injuries to the people involved. The subsequent congestion is mainly caused by stopped vehicles or lane closure, but it is often intensified by slowing vehicles with drivers observing the accident scene. The effects...

VII California: Development and Deployment— Lessons Learned

Misesner, Jim
Dickey, Susan
VanderWerf, Joel
Shrafasaleh, Ashkan
Li, Kang
Tan, Han-Shue
Li, Meng
Zou, Zhi-jun
Bu, Fanping
Huang, Ching-Ling
Xu, Guan
Shladover, Steven;
Kuhn, Tom
Barth, Matt
Todd, Michael
Zhang, Wei-Bin
2009

This PATH Research Report covers the (Vehicle-Infrastructure Integration) VII California Development and Deployment (Task Order 5217) efforts from October 2005 – December 2007. Because TO 5217 is followed by the continuation TO 6127, it is a compendium of very applications-oriented research to date as well as a final report to TO 5217.It is organized to impart the very specific and generally very pragmatic implementation details first, beginning with an introduction (Section 1), description of VII hardware, general network and installation (Section 2), then progressing to a more detailed...

National Automated Highway System Consortium: Modeling Stakeholder Preferences Project

Lathrop, John
Chen, Kan
1997

This document is the final report of the Modeling Stakeholder Preferences Project. The results of the project consist of three results: 1) evaluation framework; 2) focus group non-quantitative findings/ recommendations; and, 3) performance/impact measures, their endpoints, rankings and weights, for each stakeholder group.

Smart Parking Pilot on the Coaster Commuter Rail Line in San Diego, California

Rodier, Caroline
Shaheen, Susan A.
Blake, Tagan
2010

Public transit authorities increasingly are harnessing advances in sensor, payment, and enforcement technologies to operate parking facilities more efficiently. In the short term, these innovations promise to enhance customer parking experiences, increase the effective supply of existing parking with minimal investment, and increase ridership and overall revenue. Over the longer term, these systems could further expand ridership by generating revenue to add parking capacity and improve access. This report describes the Smart Parking Pilot Project on the COASTER commuter rail line in San...

Final Report: Mobile Surveillance and Wireless Communication Systems Field Operational Test Volume 2: FOT Objectives, Organization, System Design, Results, Conclusions and Recommendations

Klein, Lawrence
1999

The Mobile Surveillance and Wireless Communication Systems Field Operational Test (FOT) evaluated the performance of wireless traffic detection and communications systems in areas where permanent detectors, electrical power, and landline communications were not available. The FOT partners designed and built six surveillance and three ramp meter trailers, a video and data retransmission or relay site, and video and data reception facilities at the Caltrans District 12 and Anaheim Traffic Management Center (TMCs) and the University of California at Irvine Institute of Transportation Studies(...