This Tetra Tech “RailAI” track geometry inspection car was rebuilt from an old H&S boxcar in 2023. It’s an automated, self-contained rolling laboratory, outfitted with various sensors to examine track conditions such as position, curvature, alignment, smoothness, track gauge, as well as defects such as incorrect rail profile, rail warp, and other parameters. It can then record and transmit this data in detail and mark areas needing repair or adjustment.