Authors: Markus Caprez, Emil Doupal, Bernard Jacob, Alan J. O'Connor, Eugene J. O'Brien
Addresses: Swiss Federal Institute of Technology, ETH-Zurich, CH-8093 Zurich, Switzerland. ' Swiss Federal Institute of Technology, ETH-Zurich, CH-8093 Zurich, Switzerland. ' Department for Science and Technology, Laboratoire Central des Ponts et Chaussees, 58 Bd. Lefebvre, F75732 Paris Cedex 15, France. ' Civil Engineering Department, Trinity College, Dublin 2, Ireland. ' Civil Engineering Department, Trinity College, Dublin 2, Ireland
Abstract: This paper describes a large-scale test of six WIM systems and four additional sensors on an urban roadway in Zurich, Switzerland. Gross weights from some thousands of statically weighed vehicles were used to determine the levels of accuracy for each system, with reference to the new draft of the European specification on WIM (C0ST323). The accuracy of axle weights was not tested. The WIM sensors, which included one prototype, were tested with the assistance of a recording and processing device supplied by the organiser. Most systems encountered some problems, failures and faults, under the carefully controlled conditions of the 30-month test. However, these were generally solved by the suppliers after some delay. Statistics are provided on overall levels of accuracy and on trends with season and time. In addition, a brief history of system malfunctions and failures is provided. Nevertheless the scope of the conclusions is limited by the traffic conditions and the test plan.
Keywords: road traffic; vehicle weight; weigh-in-motion; WIM; WIM sensors; WIM systems; Switzerland.
International Journal of Heavy Vehicle Systems, 2000 Vol.7 No.2/3, pp.169 - 190
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