Infrastructure

Roadway Powered Electric Vehicle Project Track Construction And Testing Program Phase 3D

Systems Control Technology, Inc.
1994

This report covers the construction and testing of a Roadway Powered Electric Vehicle (RPEV) proof-of-concept system. The test facility was built at the University of California Richmond Field Station. The facility has a 700-foot test track and an operational 35-passenger RPEV. The report contains an introduction to the concept of RPEV and discusses the following aspects of the project: systems engineering and design, vehicle, facilities, testing, related RPEV research, and control circuits.

Deployment Path Analysis for Cooperative ITS Systems

Shladover, Steven E.
2009

Although the performance advantages of cooperative ITS systems are generally appreciated, the deployment challenges that they pose represent a significant impediment. This report begins with a summary of the types of deployment challenges faced by cooperative information systems and cooperative vehicle-highway automation systems (CVHAS), both of which require coordination of deployment of vehicle and infrastructure-based elements. The institutional challenges are discussed first, followed by the technological challenges. In each case, current progress in overcoming these challenges is...

Establishing Infrastructure Requirements for Bus Rapid Transportation Operations in Dedicated Bus Lanes

Monismith, Carl L., P.E.
Weissman, Shmuel L., PhD
Popescu, Lorina
Santero, Nicholas J.
2008

Bus Rapid Transit (BRT) has the potential to improve mass transit service and contribute to reduced traffic congestion in urban areas. To achieve this improvement in service BRT will require the use of dedicated bus lanes together with lane assist and precision docking (LA/PD) to accelerate the passenger boarding process. Using this approach, BRT lanes can be reduced somewhat in width. However, such a reduction will result in increased channelization of traffic which in turn can lead to a more rapid development of pavement distress. With today’s improved pavement engineering technology, it...

Effects of Cooperative Adaptive Cruise Control on Traffic Flow: Testing Drivers' Choices of Following Distances

Shladover, Steven E.
Nowakowski, Christopher
Cody, Delphine
Bu, Fanping
O’Connell, Jessica
Spring, John
Dickey, Susan
Nelson, David
2009

A Cooperative Adaptive Cruise Control (CACC) system has been developed by adding a wireless vehicle-vehicle communication system and new control logic to an existing commercially available adaptive cruise control (ACC) system. The CACC is intended to enhance the vehicle-following capabilities of ACC so that drivers will be comfortable using it at shorter vehicle-following gaps than ACC. If this is shown to be the case, it offers a significant opportunity to increase traffic flow density and efficiency without compromising safety or expanding roadway infrastructure.This report describes the...

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...

A Vehicle to Roadside Communications Architecture for ITS Applications

Lo, Tetiana
Varaiya, Pravin
2000

In this report we present a framework to assist Intelligent Transportation Systems (ITS) providers in the deployment of ITS user services requiring wide-area wireless communi-cations. We examine a scenario in the San Francisco East Bay Area for the 1995 time frame and determine the applicable ITS user services and wide-area wireless messaging requirements. Using the programming language SHIFT we investigate the uplink perfor-mance of a leading wireless candidate, Cellular Digital Packet Data in terms of its ability to support vehicle-to-roadside ITS applications during normal peak-period...

Development of BRT Architecture: A System Engineering Approach

Hickman, Mark
Tan, Chin-Woo
Lau, Peter
Zhang, Wei-Bin
2006

This report discusses the development of system architecture for Intelligent Transportation Systems (ITS) applications for Bus Rapid Transit (BRT) systems. In the course of the development of system architecture, it is critical to take a system engineering approach in the development of BRT architecture to assess BRT service needs (or features), the functional realization of these service needs and the means of technological implementation. Motivated by the National ITS architecture, the BRT architecture has a hierarchy of three layers: application, physical, and logical. The application...

On-line Traffic Signal Control Scheme with Real-time Delay Estimation Technology

Liu, Henry X.
Oh, Jun S.
Oh, Seri
Chu, Liany
Recker, Will
2001

This paper presents an on-line signal control scheme integrated with the real-time intersection delay estimation technology. The primary goal of this study is to design a complementary optimization module to the existing controller to minimize the total delay experienced by traffic and improve the system performance at the signalized intersections. This paper proposes a feedback control algorithm that optimizes the signal timing plan based on delay estimated via vehicle re-identification technology. Main thrust of the algorithm is on-line control capability utilizing direct delay measures...

Communication Requirements and Network Design for IVHS

Hsu, Ivy Pei-Shan
Walrand, Jean
1993

This paper presents the communication needs between vehicles and the roadside infrastructure for IVHS applications. The requirements of each application, in terms of message length, frequency, and acceptable delay, are estimated. Based on these estimates, we assess the amount of radio spectrum needed to support these applications. We find that about 1.2 MHz is required to support full highway coverage. We discuss the topology and capacity allocation problems for the road-based network and present one possible implementation. We show a case study of network design and link capacity...

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.