Concrete tub crossings are at-grade railroad crossings used primarily on low-speed and lowtonnagerail lines. Concerns have been raised about the stiffness differential present betweenthe track structure and crossing that could cause a localized shear strain increase. Due to thisconcern, much of the industry has limited speed of trains through these crossings to 40 kph (25mph). This investigation evaluates a concrete tub crossing that experiences higher speeds andhigher tonnage than typical. Visual observations and field performance indicate satisfactoryperformance of the crossing with little maintenance. Strain gauges mounted on the rail web wereused to measure shear strains of trains at differing speeds. Results show little difference inmaximum shear strain for train speeds up to 97 kph (60 mph). Concrete tub crossing shear demandsare below shear capacity and independent of train speed, suggesting crossings can safelyhandle heavy railway traffic at greater speeds.