Input data examples when working with TRACK files

TRACK: Directory TRACK containing examples of different tracks.
TRACK.trc_traccurf: Remove the designed track geometry from a TRACK file.
TRACK.trc_tracmodf: Modify a TRACK file, change static levels and amplitudes.
TRACK.trc_tracplf: Plotting of TRACK diagrams.
TRACK.trc_qnumb_trackf: Calculates the track alignment quality.
TRACK.trc_meanf: Calculates the mean gauge of a track.
TRACK.trc_updownf: Changes the direction of a track.