"A track geometry car (also known as a track recording car) is an automated track inspection vehicle on a rail transport system used to test several ...
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geometric parameters of the track without obstructing normal railroad operations. Some of the parameters generally measured include position, curvature, alignment of the track, smoothness, and the crosslevel of the two rails. The cars use a variety of sensors, measuring systems, and data management systems to create a profile of the track being inspected." - (en.wikipedia.org 02.05.2020)
