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More than three-quarters of
our track is on modern concrete

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sleepers, which can help rails
withstand very hot weather. But

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sometimes, steel rails get so hot
they expand and bend or break.

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When very hot
weather is forecast,

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we introduce emergency
speed restrictions.

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Slower trains mean less
pressure on the rail,

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which means the rail is
less likely to buckle -

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keeping you safe by
avoiding derailments.

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Speed restrictions also help
avoid damage from overhead line

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equipment that's
expanded and sagged.