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Event detection based on loop and journey time data

Event detection based on loop and journey time data
Event detection based on loop and journey time data
An algorithm that examines the travel time (TT) and the corresponding loop-based information at the same time is proposed. It monitors TT and the traffic speeds on all the loops within the TT section continuously. Event alerts are activated when there is a significant reduction of speeds on at least one loop detector in addition to a significant increase in the TT. An event may be detected by TT at some stage, by loop data at another stage, or by a logical combination of two. The algorithm using fixed thresholds has been tested based on operational data collected in the National Traffic Control Centre. The thresholds are determined based on tradeoffs between detection and false alarm rates (FAR). Test results based on a full day of data indicate that the integrated algorithm has achieved an impressive detection rate and a FAR which should be easily manageable by operators. Further work would be needed to confirm operations and facilitate a practical implementation.
1751-956X
113-119
Zheng, P.
a46dbafc-a753-4f22-b825-a00fd36ebd44
McDonald, M.
cd5b31ba-276b-41a5-879c-82bf6014db9f
Jeffery, D.
6b14749b-4e69-45bb-976b-3bf197dc6c88
Zheng, P.
a46dbafc-a753-4f22-b825-a00fd36ebd44
McDonald, M.
cd5b31ba-276b-41a5-879c-82bf6014db9f
Jeffery, D.
6b14749b-4e69-45bb-976b-3bf197dc6c88

Zheng, P., McDonald, M. and Jeffery, D. (2008) Event detection based on loop and journey time data. IET Intelligent Transport Systems, 2 (2), 113-119. (doi:10.1049/iet-its:20070042).

Record type: Article

Abstract

An algorithm that examines the travel time (TT) and the corresponding loop-based information at the same time is proposed. It monitors TT and the traffic speeds on all the loops within the TT section continuously. Event alerts are activated when there is a significant reduction of speeds on at least one loop detector in addition to a significant increase in the TT. An event may be detected by TT at some stage, by loop data at another stage, or by a logical combination of two. The algorithm using fixed thresholds has been tested based on operational data collected in the National Traffic Control Centre. The thresholds are determined based on tradeoffs between detection and false alarm rates (FAR). Test results based on a full day of data indicate that the integrated algorithm has achieved an impressive detection rate and a FAR which should be easily manageable by operators. Further work would be needed to confirm operations and facilitate a practical implementation.

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More information

Published date: June 2008
Venue - Dates: 6th European Congress on Intelligent Transport Systems and Services, Aalborg, Denmark, 2007-06-18 - 2007-06-20

Identifiers

Local EPrints ID: 52817
URI: http://eprints.soton.ac.uk/id/eprint/52817
ISSN: 1751-956X
PURE UUID: 86bef87e-00d6-4b73-80b8-a41af39dce67

Catalogue record

Date deposited: 14 Jul 2008
Last modified: 15 Mar 2024 10:38

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Contributors

Author: P. Zheng
Author: M. McDonald
Author: D. Jeffery

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