Upgrade works at junctions 15 (Llanfairfechan Roundabout) and 16 (Puffin Roundabout, Penmaenmawr) to replace the existing roundabouts with grade-separated interchanges, allowing uninterrupted free-flowing travel on the A55. The scheme will result in an uninterrupted expressway from the end of the M56 north of Chester to the Britannia Bridge west of Bangor.
Multiple options are under consideration for each junction. Preferred options are expected to be published in summer 2019, and a statutory enquiry will then follow.
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WIth thanks to Gareth Hill for information on this page.