New York City's transit authority is one of a few US systems experimenting with using sensors and AI to improve track inspections.

The subway in NYC has received a huge upgrade, but it’s probably not at all what you’d expect. No, it is not coming in the form of new trains or renovations to stations (even though that would be great). Actually, the MTA is testing a system that effectively transforms Google Pixel Android smartphones into powerful diagnostic tools for tracking rail defects!

New York City's Metropolitan Transportation Authority and Google have successfully tested technology that uses smartphone sensors to detect subway track defects, the MTA said Thursday. The four-month experiment, dubbed TrackInspect, mounted six Google Pixel phones on four A train subway cars travers...