The paper gives a brief overview of current research work undertaken at the North American
Facility for Accelerated Service Testing (FAST) railway test facility and on several railroads that are members
of the Association of American Railroads (AAR).
This update reviews the latest information from monitoring of two steel spans, two concrete bridges, a
Hybrid Composite span and a T-rail reference bridge, as well as a number of other tests relevant to railway
bridge performance in North America