Track bed

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Trackbed
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Section through railway track and foundation showing the ballast and formation layers

The track bed or trackbed is the groundwork onto which a

railway track is laid. Trackbeds of disused railways are sometimes used for recreational paths or new light rail
links.

Background

According to

sub-ballast above a prepared subgrade
/formation (see diagram). It is designed primarily to reduce the stress on the subgrade.

Other definitions include the surface of the ballast on which the track is laid,[1] the area left after a track has been dismantled and the ballast removed[1] or the track formation beneath the ballast and above the natural ground.[2]

The trackbed can significantly influence the performance of the track, especially ride quality of passenger services.

See also

  • Embankment (transportation)
  • Roadbed
  • Subgrade

References

Look up trackbed or track bed in Wiktionary, the free dictionary.
  1. ^
    ISBN 978-1-8472-8643-7
    ., p. 386.
  2. ISBN 0-7509-4218-5
    .
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