Intelligent Transportation Systems

Improving Transit Performance with Advanced Public Transportation System Technologies

Hansen, Mark
Qureshi, Mohammad
Rydzewski, Daniel
1994

This report identifies opportunities to improve transit performance using Advanced Public Transportation System (APTS) Technologies, assesses transit operator viewpoints on and experiences with APTS technologies, and proposes how current adoption and utilization practices might be improved so that these technologies are used in a more efficient and effective manner. The study focuses on the attitudes and experiences of individual transit agency management, staff, and line personnel that are likely to determine their future choices with regard to APTS adoption and utilization. The research...

Improving Disruption Management with Multimodal Collaborative Decision-Making: A Case Study of the Asiana Crash and Lessons Learned

Marzuoli, Aude
Boidot, Emmanuel
Colomar, Pablo
Guerpillon, Mathieu
Bayen, Alexandre M.
2016

Transportation networks constitute a critical infrastructure enabling the transfers of passengers and goods, with a significant impact on the economy at different scales. Transportation modes are coupled and interdependent. The frequent occurrence of perturbations on one or several modes disrupts passengers' entire journeys, directly and through ripple effects. Collaborative decision-making has shown significant benefits at the airport level, both in the U.S. and in Europe. This paper examines how it could be extended to the multimodal network level, discusses the supporting evidence, and...

Implementing a Dynamic O-D Estimation Algorithm within the Microscopic Traffic Simulator Paramics

Garcia, Reinaldo C.
2002

California has long recognized the potential for applying electronic and other transportation systems technologies to address the significant mobility and economic challenges in the state,and the rest of the nation.Through an aggressive Advanced Transportation Systems Program,Intelligent Transportation Systems (ITS)are being researched,built,and tested for deployment.These ITS will address today s transportation needs and those of the twenty-first century.An important element of this program is the California Advanced Transportation Management Systems Testbed (California ATMS Testbed)...

Impacts of Smart Cards on Transit Operators: Evaluation of I-110 Corridor Smart Card Demonstration Project

Chira-Chavala, Ted
Coifman, Benjamin
1996

This report presents the evaluation of the first transit smart card demonstration in California. The study assesses the cost and benefit implications of the smart card system to transit agencies. Two types of smart cards were used: radio frequency (RF) proximity and contact. The assessment of the cost and productivity impacts, as well as the perceptions of transit personnel, were accomplished through personnel interviews and independent onboard observations.

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.

Field Test of Vehicle-Mounted, Forward Looking Range Sensor in Closed-Loop AVCS

Kanaris, Alex
Ioannou, Petros
1998

The purpose of MOU-233 is to evaluate and test a low cost, short range radar sensor developed by Amerigon corporation through a subcontract with the University of Southern California. The radar is designed to be used as a ranging sensor for automatic vehicle following applications. It is intended to be mounted in the front of the vehicle and provide measurements of the distance between the front of the vehicle and the rear of any vehicle or object ahead within a maximum distance of 17 feet. The output of the radar as supplied by Amerigon, is a 32-bit binary code, using one bit to represent...

Experimental Results of Fuzzy Logic Control for Lateral Vehicle Guidance

Hessburg, Thomas
Peng, Hei
Zhang, Wei-bin
Arai, Alan
Tomizuka, Masayoshi
1994

A Fuzzy logic controller (FLC) is designed and implemented in real time on a Toyota Celica test vehicle to achieve control of the lateral motion of the vehicle. The structure of the FLC is modularized as a feedback, preview, and gain scheduling rule base. The parameters of the FLC are tuned manually using information from characteristics of human driving operation and an existing controller. The fuzzy logic control strategies are implemented on the test vehicle, automatically following a multiple curved track using discrete magnetic markers as a lateral error reference system. The test...

Evaluation of the Advanced Operating System of the Ann Arbor Transportation Authority: Impacts of an Advanced Public Transportation System: Demonstration Project

Levine, J
Hong, Q
Hug, GE
Rodriguez, D
1999
In 1997, the Ann Arbor (Michigan) Transportation Authority began deploying a set of integrated advanced public transportation system technologies in its vehicles, stations and control center. This paper summarizes selected findings of a multidimensional evaluation of the effects of the system on schedule adherence and transfer time, passenger perception and impacts on drivers. Some improvement in on-time performance was observed in vehicle departures from major ...

Evaluation of ITS Technology for Bus Timed Transfers

Hall, Randolph
Dessouky, Maged
Nowroozi, Ali
Singh, A.
1997

This paper evaluates dispatching rules at timed transfer transit terminals. The evaluation focuses on total passenger delay and the number of passengers missing their connections. Analytical and simulation models are developed to evaluate the benefit of Intelligent Transportation Systems (ITS) applications. The authors conclude that the benefit of ITS for timed transfer alone does not justify the implementation of Global Positioning Systems (GPS) for bus tracking technology.

Development of User Needs And Functional Requirements for A Real-time Ridesharing System

Kowshik, Raghu
Gard, John
Loo, Jason
Jovanis, Paul P.
Kitamura, Ryiuichi
1993

This report documents the results of a user needs assessment conducted to define the concept of real-time ridesharing, and identify the problems that are to be addressed by the proposed Real-Time Rideshare Matching System. The user needs are then utilized to develop functional requirements for the real-time rideshare matching system. The functional requirements identify services that should be provided by the system, and the interfaces to be used to access the system.