A study on the quantitative accuracy evaluation of vehicle weight estimation using BWIM

Abstract

This study presents a method for evaluating the accuracy of axle weight estimation using Bridge Weigh-in Motion system. The study compares conventional methods, which assume white noise, with a proposed method that considers autocorrelation of dynamic component. The formulation reveal that the magnitude of the dynamic component does not affect the accuracy improvement by the proposed method. Analysis of measured data showed that the theoretical standard deviations of the estimating weight are consistently smaller with the proposed method, with a positive correlation between the standard deviation and absolute deviation, suggesting its potential for quantitative accuracy assessment even under complex vehicle traffic conditions.