Last Updated
：2025/11/20
slack
IPA(Pronunciation)
（ plural ）
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(rail transport) A temporary speed restriction where track maintenance or engineering work is being carried out at a particular place.
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slack
Because of engineering work, a slack has been imposed on the line over the next two miles, and all trains must reduce speed.
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Because of engineering work, a slack has been imposed on the line over the next two miles, and all trains must reduce speed.
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