Abstract: An interior volume of a bridge deck is probed using a transportable sensor system that produces deck data useful for assessing internal degradation of the bridge deck. Geographic position data of sensor system positioning is produced as the sensor system traverses the deck. The deck data is associated with the one or more deck locations using the geographic positioning data, and adjusted deck data is generated using adjustment data indicative of external factors that influence the deck data but are unrelated to a failure mechanism impacting the bridge deck interior. An output may be generated comprising at least the adjusted deck data.