August 1, 2023

• Track conditions blamed for derailment
• Limited inspection of track identified
• Report makes it clear that both human with automated track inspection important.

Automated track geometry measurement systems provide information for a railroad’s inspectors about track conditions, which must then be verified by an inspector, thus augmenting the overall track inspection program. Visual inspections by foot or hi-rail cannot reveal all track defects internal to the rails or stemming from precise measurement deviations. All methods of track inspection are necessary and provide actionable information to inspectors in different circumstances—one mode of inspection should not be considered superior to another mode for all track inspection needs. For example, automated track inspections by geometry cars or railcar-attached devices provide detailed information on specific track parameters, but they do not capture the diverse array of unique track hazards detectable to human inspectors. They are intended to supplement an inspection program and should not be used to supplant an inspector physically examining a track.

….

The NTSB concludes that the FRA’s restructured Focused Inspection Program would benefit from both automated and walking inspections to ensure an improved understanding of the condition of the track beyond what can be known by only automated inspections.

• Full report