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M4 Widening Junction 29 Castleton to Junction 32 Coryton

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This brochure provides additional information about the works carried out to widen the M4 junction 29 Castleton to junction 32 Coryton.

The aim of the scheme is to reduce congestion which regularly causes lengthily delays to members of the public and commercial users along this part of the M4 in South Wales. The improvements will improve journey time reliability and reduce congestion without compromising safety on this highly trafficked section.