00621681

Component

http://onlinepubs.trb.org...trr/1991/1320/1320-006.pdf

https://scholar.google.co...chie&publication_year=1991

An advanced processing capability based on the use of real-time knowledge-based expert system (KBES) technology to integrate diverse types of traffic surveillance data for freeway monitoring and control purposes, particularly as part of future "smart roads" projects, is described. One of the major functions of the prototype system is the acquisition and processing of input data drawn from sensors and processes in the real world. The real-time nature of these processes, and the associated need for decision-making information and recommendations, places particular importance on the efficient handling of data to avoid unnecessary overloading of the expert system. The relevant types of data include traffic occupancies and volumes from loop detectors in the pavement, information on traffic conditions from closed-circuit television cameras, field reports from police officers and other official personnel, and cellular and emergency telephone calls from motorists. Emphasis is placed on the way in which the data are acquired, processed, and integrated within a prototype KBES framework to achieve the objectives of the incident management tasks, specifically those of incident detection and verification. Examples are given of the implementation of these features.

This paper appears in Transportation Research Record No. 1320, Freeway Operations, Highway Capacity, and Traffic Flow 1991. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01407170

p. 40-46

1991

Transportation Research Record

0309051533

Figures (3) ; References (5) ; Tables (2)

Call boxes (Driver aid devices); Closed circuit television; Data collection; Detection and identification; Detectors; Expert systems; Freeways; Information processing; Loop detectors; Prototypes; Real time control; Real time data processing; Reports; Traffic incidents; Traffic surveillance

Incidents; Verification

Bridges and other structures; Highways; Operations and Traffic Management; I71: Traffic Theory

TRIS, TRB, ATRI

Apr 30 1992 12:00AM

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