In September of 1984, the First Track Geometry Car (TGC1) entered service. TGC’s have the capability to measure track alignment, and spot existing and potential track problems. They are able to measure various track conditions upwards of six times a year on each line and are equipped with sensors to measure alignment, curvature, warp, track gauge, and numerous other rail conditions. As the cars inspect the rails, data is automatically uploaded to a management system to create a profile for that