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Records kept by railroad dispatchers on a continual basis of the movement of trains over the portion of the railroad under the dispatcher's responsibility.

Documents authorizing changes to the timetable governing the movement of trains over the railroad.

Documents authorizing changes to the timetable governing the movement of trains over the railroad.

A cross-sectional representation of a section of railroad line, intended to show changes in elevation over a route.

A cross-sectional representation of a section of railroad line, intended to show changes in elevation over a route.

A cross-sectional representation of a section of railroad line, intended to show changes in elevation over a route.

A cross-sectional representation of a section of railroad line, intended to show changes in elevation over a route.

Documents setting out information on railroad service times. Typically, the timetable will list the times when a service is scheduled to arrive at and depart from specified locations.

Documents setting out information on railroad service times. Typically, the timetable will list the times when a service is scheduled to arrive at and depart from specified locations.

Documents setting out information on railroad service times. Typically, the timetable will list the times when a service is scheduled to arrive at and depart from specified locations.