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.
113-119
Zheng, P.
a46dbafc-a753-4f22-b825-a00fd36ebd44
McDonald, M.
cd5b31ba-276b-41a5-879c-82bf6014db9f
Jeffery, D.
6b14749b-4e69-45bb-976b-3bf197dc6c88
June 2008
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), .
(doi:10.1049/iet-its:20070042).
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
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Date deposited: 14 Jul 2008
Last modified: 15 Mar 2024 10:38
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Contributors
Author:
P. Zheng
Author:
D. Jeffery
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