PATH

Truck CACC Implementation, Field Test and Data AnalysisResults

Lu, Xiao-Yun
2018

This report documents the CACC implementation and field tests for Class-8 trucks. The CACC system design for this implementation has been documented in a separate report. The field tests include two types: some limited freeway tests for control system tuning and development purposes, and extensive tests of fuel consumption at Transport Canada’s Motor Vehicle Test Centre near Montreal. Although the objective of the latter test was for fuel economy analysis of CACC operations, the data have been used for CACC performance analysis in this report since most of the fundamental scenarios have...

Potential Payoffs From Ivhs: A Framework For Analysis Appendix C

Rockwell International Science Center
1992

This Appendix documents the details of the Intelligent Vehicle Highway Systems (IVHS) benefit analysis DEMOS models and provides the PATH user information about what is contained in and how to use the models. The object of this study was to structure an approach to evaluate the relationships of the top-level IVHS goals to the implementable actions and assess the relative benefits of those actions. The DEMOS model has been used as a tool to analyze selected IVHS actions with the goal of determining the key driving parameters through the use of sensitivity analysis.

PLANTiS: Organization And Integration Of Modules

Paramsothy, Thananjeyan
Khattak, Asad
Lovell, David
Kanafani, Adib
1995

This paper discusses the integration of PLANiTS (Planning and Analysis Integration for Intelligent Transportation Systems) components. The integration is achieved by defining a structure for representing transportation improvement actions, performance measures and environment in terms of spatial, temporal and user dimensions. A discussion is also presented on the key issues related to computer implementation including data dimension, a data dictionary, data modeling, and data transformations. A basis is developed for the next implementation of PLANiTS.

Emergency Vehicle Maneuvers and Control Laws for Automated Highway Systems

Toy, Charmaine
Leung, Kevin
Alvarez, Luis
Horowitz, Roberto
2001

In this report control laws and maneuvers for high priority emergency vehicle transit on automated highways are presented. The work presented is specifically designed for use with the Partners for Automated Transit and Highways (PATH) hierarchical control architecture. The types of control laws that are needed for the different hierarchical layers are examined, and specific maneuvers for the coordination and link layers are presented. Simulations using SmartCAP (a mesoscopic traffic simulator) and SmartAHS (a microscopic traffic simulator) demonstrate the maneuvers' functionality.

Development of a Heavy-Duty Diesel Modal Emissions and Fuel Consumption Model

Barth, Matthew
Younglove, Theodore
Scora, George
2005

There have been significant improvements in recent years in transportation and emissions modeling, in order to better evaluate transportation operational effects and associated vehicle emissions. In particular, instantaneous or modal emissions models have been developed for a variety of light-duty vehicles. To date, most effort has focused primarily on developing these models for light-duty vehicles with less effort devoted to Heavy-Duty Diesel (HDD) vehicles. Although HDD vehicles currently make up only a fraction of the total vehicle population, they are major contributors to the...

A Specification Of An Automated Freeway With Vehicle-borne Intelligence

Hitchcock, Anthony
1992

The focus of this work is to derive a technique of safety analysis for an automated freeway system. To demonstrate the method of safety analysis a procedure called fault tree analysis is applied. The specified freeway operates with vehicles in platoons. The safety criterion used here is that two or more simultaneous faults must occur independently before the hazards can arise.

Safety and Throughput Analysis of Automated Highway Systems

Godbole, Datta N.
Lygeros, John
2000

We investigate the effect of a number of design alternatives on the safety and capacity of an Automated Highway System. Our methodology makes use of two computational tools, designed to highlight the fundamental limitations of the vehicle dynamics, sensing and control strategies and inter-vehicle communication. The first tool produces the minimum spacing necessary for two vehicles not to collide, as a function of their state and capabilities. The second tool investigates the multiple collisions that may occur in a string of vehicles if the spacing requirements of the first tool are...

Industry Needs and Opportunities for Truck Platooning

Shladover, Steven E
Campbell, Robert
Kailas, Aravind
Boyd, Stephen
Torrey, Ford
2015

Representatives of the trucking industry have been surveyed to try to identify their needs and concerns related to truck platooning systems. These surveys revealed the need to provide clearer and more comprehensive descriptions of the truck platooning concepts to ensure that the respondents understand what it is and how it works. The fleet managers tended to be more receptive to truck platooning than the drivers, and even those respondents who had some prior experience driving trucks with adaptive cruise control (ACC) and forward collision warning systems were no more receptive to truck...

Smart Corridor Evaluation Plan: Conceptual Design

Miller, Mark
Khattak, Asad
Hall, Randolph
Giuliano, Genevieve
Moore, James
Wachs, Martin
1994

This report presents the Conceptual Design Plan for evaluating the effectiveness of the Smart Corridor Demonstration Project. The specific objectives of this report are to: 1) develop a conceptual structure for the Smart Corridor evaluation, 2) define evaluation data requirements and collection procedures, and 3) select and/or develop data reduction and data analysis methodologies. Overall, the Smart Corridor is designed to obtain improved utilization of existing roadway facilities, both freeway and arterial, through the use of Advanced Traveler Information Systems ( ATIS) and Advanced...

An Interface Between Continuous And Discrete-event Controllers For Vehicle Automation

Lygeros, John
Godbole, Datta N.
1994

Automation of highways and in particular platooning of vehicles raises a number of control issues. A hierarchical structure is used to address these issues. The work presented here is an attempt at constructing a consistent interface between discrete event and continuous time controllers. The design proposed is a finite state machine that communicates with the discrete controllers by issuing commands that get translated to "jerk" input for the vehicle engine. The operation of the proposed design is tested using COSPAN. By virtue of the fact that the interface touches on both the discrete...