Intelligent Transportation Systems

Identification and Prioritization of Environmentally Beneficial Intelligent Transportation Technologies: Modeling Effort

Young, Troy
Sperling, Daniel;
Shaheen, Susan
1999

In 1996, California Partners in Advanced Transit and Highways (PATH) commissioned a project team led by the Institute of Transportation Studies, University of California at Davis with the Claremont Graduate School to undertake a review of the environmental impacts of Intelligent Transportation Systems (ITS). The objectives of this project were to: 1) review previous qualitative and quantitative environmental assessments of ITS, from both field operational tests and modeling studies; 2) review the regulatory and policy contexts which encompass ITS; 3) develop a modeling framework suitable...

Identification And Prioritization Of Environmentally Beneficial Intelligent Transportation Technologies

Shaheen, S.
Young, T.
Sperling, D.
Jordan, D.
Horan, T.
1998

This report presents an literature review on the energy and environmental impacts of Intelligent Transportation Systems (ITS) technologies, a presentation of the development of deployment/modeling scenarios, and a description of the modeling effort. It looks at the current polity context and regulatory arena in which ITS technologies will be deployed. It also provides scenarios and market penetration estimates developed to form the basis of modeling efforts with the INTEGRATION model.

Intermodal Transportation Operation System ( ITOS ) For The State Of California

Hall, Randolph
Parekh, Chethan
Thakker, Viral
1998

Intermodal transportation entails the coordinated movement of different types of transportation (rail, truck, automobile, etc.) to serve the needs of travelers and shippers. The purpose of this report is to provide a vision for systems to coordinate intermodal operations in California in the future, and also to document the types of systems that are being used today in a range of transportation modes. An intermodal system could, conceivably, establish a center (or centers) that is responsible for the joint operation of multiple modes of transportation. This is not our preferred vision....

Investigation of Traveler Information and Related Travel Behavior in the San Francisco Bay Area

Khattak, Asad J.
Targa, Felipe
Yim, Youngbin
2003

Advanced Traveler Information Systems are becoming an integral part of urban transportation systems. This paper discusses issues related to how people access, acquire and use travel information. The perceived benefits and willingness to pay for dynamic information are discussed. Empirical evidence from a major field operational test is examined to answer questions about why, how and who uses travel information. Empirical evidence suggests that information helps travelers to switch routes and departure time. The potential for information benefits is perhaps higher in cases of unexpected...

Preliminary Findings for a Lane-Keeping and Collision-Warning Driver Interface for Snowplow Operations

Steinfeld, Aaron
Tan, Han-Shue
1999

This paper describes the development process and some preliminary findings for the human-machine interface (HMI) component of a system to aid snowplow operators. The HMI was developed though a series of driver task explorations and prototype tests. The HMI design has resulted in positive driver feedback and quick learning periods. Keywords Driver assist system Snowplow Lane keeping interface Collision warning interface Human factors - snowplow

Transit ITS Simulator (TRANSITS): Design Document

Dessouky, Maged
Singh, Ajay
Hall, Randolph
1997

This report describes a simulation model developed to evaluate the impact of using Intelligent Transportation Systems (ITS), such as Global Positioning Systems (GPS) for bus tracking, on controlling buses in wide-area transit networks. Control strategies with ITS will be compared against those without ITS (i.e., they do not rely on communication or tracking). The model is developed using a general-purpose simulation language, AweSim (Pritsker, 1997). The simulation model is generic and independent of any dedicated transit network. The model has high flexibility and can be used to simulate...

Robust Multiple Car Tracking With Occlusion Reasoning

Koler, Dieter
Weber, Joseph
Malik, Jitendra
1994

In this paper, the authors address the problem of traffic surveillance in an Advanced Transportation Management System. They propose a new approach for detecting and tracking vehicles in road traffic scenes that attains a level of accuracy and reliability which lies beyond currently available systems. High accuracy and reliability are obtained by using an explicit occlusion reasoning step, employing a contour tracker based on intensity and motion boundaries.

Orange County Transit/traffic Management Integration And Traveler Information Project: Evaluation Plan

Hall, R.
Hickman, M.
1996

This document focuses on a Field Operational Test (FOT) to develop an integrated information system for transit and traffic management and for traveler information that relies on Global Positioning System (GPS) equipped buses as probe vehicles. The document provides the evaluation plan for the FOT. The plan covers three principal elements: 1) Institutional, TMC Operator and Bus Operator, 2) Public Knowledge and Perceptions, and 3) System performance. The document provides an overall evaluation framework that describes how the evaluation elements will assess project objectives. In addition...

Vehicle Longitudinal Control Test

Choi, Sei-bum
1994

This report evaluates several engine torque control laws for longitudinal vehicle control. The control laws are implemented and tested on a low speed test track. The test results and analysis show that engine manifold air-dynamics can not be neglected especially at low engine speed. An ultrasonic distance sensor is evaluated under several road conditions. Two vehicle tracking control is tested using the ultrasonic sensor and radio transceivers.

Adaptive Signal Control System with On-line Performance Measure for Single Intersection

Liu, Henry X.
Oh, Jun-Seok
Recker, Will
2002

This paper introduces an adaptive signal control system utilizing an on-line signal performance measure. Unlike conventional signal control systems, the proposed method employs real-time delay estimation and an on-line signal timing update algorithm. As a signal performance measure, intersection delay for each phase is measured in real-time via an advanced surveillance system that re-identifies individual vehicles both at upstream and downstream stations using vehicle waveforms obtained from advanced inductive loop detectors. In each cycle, the signal timing plan is optimized based on the...