the most common bridge application of wim is the assessment of traffic loading. the intensity of traffic on a bridge varies greatly as some roads are much busier than others. for bridges that have deteriorated, this is important as a less heavily trafficked bridge is safer and more heavily trafficked bridges should be prioritized for maintenance and repair. a great deal of research has been carried out on the subject of traffic loading on bridges, both short-span, including an allowance for dynamics, and long-span.