PATH

Roadway Powered Electric Vehicle Project Parametric Studies: Phase 3D Final Report

Systems Control Technology
1996

This study looked at the application of electrification and automation to freeways in the Los Angeles region. The report is broken down into the following sections: Development and Enhancement of Analysis Tools, Inductive Coupling System Design, Value Engineering of Roadway Cores, and Economic Analysis of Roadway Powered Electric Vehicle (RPEV) Technology.

Revenue Models for Advanced Traveler Information Systems

Yim, Y. B.
2001

The paper describes current trends in the traveler information supply system and the prospect for potential markets for advanced traveler information in the United States and Europe. Alternative revenue models are identified that may be able to support the operation of the newly created traveler information centers in the post-field operational test phase. In the past, public agencies have been reluctant to share traffic management responsibilities with the private sector. However, this study found that the current trend is toward a public-private partnership in the form of a franchised or...

Section-Related Measures of Traffic System Performance: Prototype Field Implementation

Ritchie, Stephen G.
Sun, Carlos
Oh, Seri
Oh, Cheol
2001

In this project (MOU 336),an initial phase of a field implementation was accomplished of the results of a previous research project (MOU 224),in which a vehicle reidentification algorithm based on loop signature analysis was developed using freeway traffic data.This algorithm was extended to non-freeway cases, initially using a section of 2-lane major arterial in cooperation with the City of Irvine,California.The technique was enhanced to address problems such as "irregularities " in vehicle signatures associated with trucks,tail-gating vehicles and erroneous counting of vehicles,with the...

Dynamic Origin/Destination Estimation Using True Section Densities

Sun, Carlos
Porwal, Himanshu
2000

This final report presents a practical approach for dynamic origin/destination demandestimation. The proposed dynamic origin/destination estimation framework addressesmany of the shortcomings of the existing formulations and presents a formulation forgeneral networks and not just corridors. One unique feature of this framework is its useof section density as a variable instead of flow. The framework is built upon thefoundation of static origin/destination matrix estimation by adding the temporal aspect.Two traffic assignment models, namely DYNASMART and DTA are used for assigningdynamic...

Caltrans Connected and Automated Vehicle Strategic Plan

McKeever, Ben
Wang, Peggy
West, Tom
2020

This report is the culmination of a year-long effort to develop a connected and automated vehicle (CAV) Strategic Plan for the California Department of Transportation (Caltrans). The purpose of the CAV Strategic Plan project is to define a vision and tactical strategy for Caltrans in preparation for CAV deployment in California and to begin a policy development process to keep California at the forefront of this emerging industry. This plan recommends actions for Caltrans to carry out within the next five years. Caltrans has a strong interest in planning for the fast-moving evolution in...

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...

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...