Testing of bridge weigh-in-motion system in sub-Arctic climate

Systems for weighing vehicles while they are in motion are in widespread use in many countries. The accuracy of these weigh-in-motion (WIM) systems is strongly influenced by the road profile and vehicle dynamics. Systems based on sensors that are embedded in the pavement or placed on top of the road surface can only measure the axle load for the fraction of a second for which the wheels are present on the sensor. An alternative to pavement WIM systems that increases the length of the load-sensitive element is to use an existing bridge as a weighing scales (Bridge WIM). A major test of a Bridge WIM system at a test site near the Arctic Circle is described in this paper.