Testing the accuracy of BWIM systems.

Summary A new methodology to test the accuracy and to assess the category of a bridge weigh-in-motion (BWIM) system is described in this paper. It is based on a statistical composite hypothesis test. This statistical test can be build either in the unbiased setting or in the asymptotical setting. This procedure is compared to the benchmark detailed by the COST 323 action in terms of maximal admissible empirical standard deviation to be in a fixed class of accuracy. This methodology gives also simpler formulae to practitioners still implying the costumer risk and the supplier risk but also the observation sample size whereas the observation sample size is tabulated in the benchmark.