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The Laserail™ Hy-Rail Geometry Measurement System is a full-featured geometry system designed to mount on hyrail vehicles. Two Laserail™ camera/laser pairs are utilized to provide a reference to the rail. The computer system is specially designed to operate from the 12-volt truck battery and is mounted in a small, specially designed electronics unit. A notebook computer is used for control, display and data recording to disk. The geometry software produces superelevation, left and right surface (top), gauge, warp (twist), and left and right alignment. This data is displayed on a computer screen, recorded to disk for later replay and analyzed for geometry defects. WinDBC provides a real-time video strip chart for viewing the data and a history file of geometry data from a previous run may be overlaid on the current run in real-time. The data is compatible with the other Laserail™ Geometry Measurement Systems.