This machine replaces railway ties,
all without having to remove any of the railway track.
Railroad tracks are made of three parts:
the long steel rails that the trains run on, railway ties and track ballast
which are the stones in between the tracks.
The machine uses a tie changer, which is capable of removing ballast on the tracks.
This allows it to grab the railway ties for replacing.
The ties are attached back to the track using fastening clips and then the ballast is smoothed back out.
