The effects of detector spacing on traffic forecasting.

Chen, Haibo, Dougherty, Mark S and Kirby, Howard (2001) The effects of detector spacing on traffic forecasting. Computer-Aided Civil and Infrastructure Engineering, 16 (6). pp. 422-430. ISSN 1093 9687

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An investigation was made as to how short-term traffic forecasting on motorways and other trunk roads is related to the density of detectors. Forecasting performances with respect to different detector spaces have been investigated with both simulated data and real data. Pruning techniques to the input variables used for neural networks were applied to the simulated data. The real data were collected from the M25 motorway and included flow, speed, and occupancy. With the data used in our study, the forecasting performances decrease with the increase of detector spaces. However, by taking the assumed costs of detector infrastructure into account, it may be concluded from this study that increasing coverage to a spacing of 500 m gives little extra benefit and may actually be counter productive in certain circumstances. It was concluded that, on the basis of current evidence, a detector spacing of between 1 and 1.5 km might be optimal.

Item Type: Article
Print ISSN: 1093 9687
Electronic ISSN: 1467-8667
Uncontrolled Keywords: Motorways; Road traffic detection; Detector spacing; Large intervals; Decline in predictions; Optimal spacing calculation;
University Divisions/Research Centres: Edinburgh Napier University, Transport Research Institute
Dewey Decimal Subjects: 600 Technology > 620 Engineering > 621 Electronic & mechanical engineering
300 Social sciences > 380 Commerce, communications & transportation > 388 Transportation; ground transportation
Library of Congress Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
H Social Sciences > HE Transportation and Communications
Item ID: 1894
Depositing User: RAE Import
Date Deposited: 27 Feb 2008 11:33
Last Modified: 21 Aug 2013 09:00

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