Abstract
Weigh-in-Motion systems are tools to prevent road pavements from the adverse phenomena of vehicle overloading. However, the effectiveness of these systems can be significantly increased by improving weighing accuracy, which is now insufficient for direct enforcement of overloaded vehicles. Field tests show that the accuracy of Weigh-in-Motion axle load sensors installed in the flexible (asphalt) pavements depends on pavement temperature and vehicle speeds. Although this is a known phenomenon, it has not been explained yet. The aim of our study is to fill this gap in the knowledge. The explanation of this phenomena which is presented in the paper is based on pavement/sensors mechanics and the application of the multilayer elastic half-space theory. We show that differences in the distribution of vertical and horizontal stresses in the pavement structure are the cause of vehicle weight measurement errors. These studies are important in terms of Weigh-in-Motion systems for direct enforcement and will help to improve the weighing results accuracy.
Highlights
The studies presented in the paper proved that the weighing accuracy in Weigh-in-Motion systems depends on the pavement/sensor complex behavior under dynamic loads of the vehicle axle
Systems depends on the pavement/sensor complex behavior under dynamic loads of the vehicle
In the case of Weigh-in-Motion system (WIM) systems, the pavement constitutes a part of the measuring system, properties affected the weighing result accuracy
Summary
Research proved that the detrimental effect of one heavy vehicle on the pavement structure is equivalent to the same effect caused by tens of thousands of passenger cars. Axle load sensors of such systems are embedded directly in the pavement of the road, perpendicular to the direction of the traffic flow (see Figure 1) Such construction of the WIM systems allows for the weighing of vehicles in motion without the need to stop them, and makes the control effective because each vehicle passing. For axle load and 5% for gross vehicle weight (GVW) This is the reason why WIM systems are not currently in use for direct enforcement of overloaded vehicles. Another problem is that there are axle load and systems are not currently in use for direct enforcement of overloaded vehicles Another problem is that there are no no relevant regulations such application of. Figure shows a diagram to this problem systems are used for preselection and identification of potentially overloaded vehicles to direct them to control on certified, static scales.
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