PATH

PLANiTS: The Methods Base, Model Selection and Model Integration

Picado, Rosella
Khattak, Asad
Lovell, David J.
Kanafani, Adib
1995

This paper presents some features of PLANiTS (Planning and Integration for Intelligent Transportation Systems). In particular, it discusses some functions of the Methods Base. These include representation of model chains, selection of models and data, and data transformations and aggregation. Sequences of models are represented using graph notation. Models and data are selected given the Planning Vector specification, although users may override system selections. The Methods Base features are illustrated with an example drawn from the PLANiTS prototype (version 1 .O).

PATH ATMIS State of the Research Annual Report Fiscal Year 1998/1999

Tam, Robert
1999

This report summarizes PATH ATMIS and Systems research for fiscal year 1998/1999. In each of the brief project descriptions we state the objectives of the project and outline its status and some of its principal results. These descriptions are not intended to be comprehensive or complete, but rather to present a picture of the main thrusts of each of the reported projects. References are provided in the end of the report for more detailed information about particular projects. Taken together, the collection of project descriptions should also give a reader an overview of the entire program...

PATH ATMIS State of the Research Annual Report Fiscal Year 1999/2000

Tam, Robert
2000

This report summarizes PATH ATMIS research for fiscal year 1999/2000. In each of the brief project descriptions we state the objectives of the project and outline its status and some of its principal results. These descriptions are not intended to be comprehensive or complete, but rather to present a picture of the main thrusts of each of the reported projects. References are provided in the end of the report for more detailed information about particular projects. Taken together, the collection of project descriptions should give the reader an overview of the entire ATMIS research program...

Modeling and Simulation Of The Automated Highway System

Eskafi, Farokh H.
1996

This report presents the hierarchical structure for the control design of an Automated Highway System (AHS). This control hierarchy has four layers: network, link, coordination, and regulation. It is used to model different AHS proposals. Control layers and the internal structure of each layer and the interfaces between then are described. Three basic maneuvers are described: join, split, and change lane. The SmartPath simulation tools are described to enable simulating AHS scenarios. The advantages of SmartPath include providing a graphical interface, providing microsimulation, and also...

Integrating Traffic Velocity Data into Predictive Energy Management of Plug-in Hybrid Electric Vehicles

Sun, Chao
Sun, Fengchun
Hu, Xiaosong
Hedrick, J. Karl
Moura, Scott
2015

Recent advances in the traffic monitoring systems have made traffic velocity information accessible in real time. This paper proposes a supervised predictive energy management framework aiming to improve the fuel economy of a power-split plug-in hybrid electric vehicle (PHEV) by incorporating dynamic traffic feedback data. Compared with conventional model predictive control (MPC), an additional supervisory state of charge (SOC) planning level is constructed in this framework. A power balance PHEV model is developed for this upper level to rapidly generate optimal battery SOC trajectories,...

Feasibility of a Gyroscope-Free Inertial Navigation System for Tracking Rigid Body Motion

Tan, Chin-Woo
Mostov, Kirill
Varaiya, Pravin
2000

We study the feasibility of designing an accelerometer-based gyroscope-free inertial navigation system (INS) that uses only accelerometers to compute the linear and angular motions of a rigid body.

Analysis of Traffic Flow with Mixed Manual and Semi-Automated Vehicles

Bose, Arnab
Ioannou, Petros
1999

During the last decade considerable research and development efforts have been devoted to automating vehicles in an effort to improve safety and efficiency of vehicle following. While dedicated highways with fully automated vehicles is a far in the future objective, the introduction of semi-automated vehicles on current highways designed to operate with manually driven vehicles is a realistic near term objective. The purpose of this paper is to analyze the effects on traffic flow characteristics and environment when semi-automated vehicles with automatic vehicle following capability (in...

Determining the Capacity Benefits of Real-Time Signal Control at Intersections

Skabardonis, Alexander
Gallagher, Brian R.
Patel, Kartik P.
2000

Traffic responsive control strategies are increasingly being implemented to improve intersection performance. Critical intersection control (CIC) is using real-time traffic data to better assign green times to conflicting movements. However, the benefits of CIC have not been assessed, and existing methodologies for estimating intersection performance do not account for CIC or other traffic responsive control strategies. The effectiveness of CIC was evaluated at seven signalized intersections in the City of Los Angeles. The findings indicate that CIC generally improves traffic operations....

Development and Field Testing of An Interactive Transit Station Information System (ITSIS) Using Connected Vehicle Technologies

Meng, Huadong
Tsao, Jacob
Zhou, Kun
Picar, Justin
Mizuno, Bradley
Zhang, Wei-Bin
2018

The objective of Interactive Transit Station Information System (ITSIS) is to better inform transit travelers during their trips and to enable dynamic transit operations to better serve travelers. The ultimate goal is to make transit more friendly and attractive to the traveling population such that transit will become a viable choice for travel and an integrated part of the solution for congestion relief. This report documents a research effort to develop and test a ITSIS prototype that uses Connected Vehicle technologies to enable the real-time interaction between passengers and transit...

Bus Rapid Transit and the Use of AVL Technology: A Survey of Integrating Change

Gillen, David
Johnson, Doug
2002

AVL represents a radical change to many working in the public transit industry. When a new technology is introduced factor proportions change, responsibilities are altered and procedures change. There are threats to lines of authority, job security and responsibility. In all cases there are threats and the successful implementation of a new technology into any firm requires that it be managed, it will not happen automatically and ultimate success of the firm will be contingent on the implementation. The adoption of new technologies has always presented challenges for managers, employees,...