A55 motorists will face 18 days of disruption later this month when partial closures are put in place to enable bridge upgrades.
Old expansion joints on bridge decks at the Goat Inn Viaduct, Conwy, need replacing after nearing the end of their lifespans.
These joints allow the bridge to accommodate movement from seismic activity and seasonal temperature fluctuations.
As they are attached to the ends of the bridge deck, they can only be removed via targeted demolition.
The bridge must then be partially rebuilt to install the replacements.
Each side of the carriageway must be closed whilst the old joints are removed and new ones installed.
The renewal work, between junctions 15 and 16, will be carried out between 6am on January 20 and 6am on February 7.
Temporary signs will warn drivers to stay on the A55 and to “expect queues and delays”.
A contraflow system will be set up to allow contractors to replace the expansion joints, each of which span the full width of the carriageway.
The closures will also be used to carry out Pen Y Clip tunnel and headland maintenance works.
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https://www.dailypost.co.uk/news/north-wales-news/a55-motorists-warned-expect-significant-22674063?IYA-mail=a05105fc-304d-4c50-9807-edab51f779a4