Union Pacific has a few Track Geometry cars that it keeps on its roster. These cars are self-propelled, can go up to 70 MPH, and can record every detail about and defect in the rails as they move along. I happened to come across the car sitting in the storage yard in North Yard on this Saturday afternoon. I came in on the Limon Sub earlier in the day, and should be heading for the Joint Line the next day.
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