Accurate estimates of characteristic traffic load effects are essential in order to optimise bridge safety assessment. Permit trucks dominate the extreme upper tail of the truck loading distribution and as a result need careful examination. This paper proposes rules for filtering these trucks from weigh-in-motion data for both the USA and Europe. The importance of these trucks in critical bridge loading events is then examined for both regions. A Monte Carlo traffic simulation model is developed, which focuses on the accurate simulation of permit trucks.
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Enright et al. (2015) studied this question.
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