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We are improving the layout of these junctions to make journeys safer and faster.

First published:
1 November 2017
Last updated:


Project status: plannedEU funds in Wales
Region/county: Conwy
Construction start date: 2021
End date: 2022
Cost: We have secured £26m of European Union funding support to deliver these junction improvements.

Why we are doing it

We aim to improve safety and journey times along the A55.

These changes will:

  • make maintenance easier
  • improve our ability to deal with emergencies

A55 junction 15 flythough:

A55 junction 16 flythrough:

Current progress

A single option strategy has been agreed for each junction.

We have published a protected route plan.

We have appointed a consultant to progress this next phase of the project. This will lead on to a further stage where we will commission a contractor to build the scheme via a design and build contract.

The plan

We will replace the roundabouts at Junction 15 and 16 with height separated junctions. Traffic will join the trunk road via a slip road instead of a roundabout. This will allow traffic on the A55 to flow more smoothly without having to slow down at a roundabout.


Option and design development: autumn 2017 to winter 2019/20
Statutory process and public enquiry: winter 2019/20 to winter 2020/21
Detailed design and construction: 2021 to 2022

How we are consulting

We held stakeholder workshops in July 2008 and a public information event in December 2017. Since the appointment of our consultant we held a 12 week consultation exercise between June and August 2018.

Next steps

Our consultant will develop the single option solution by consulting with our stakeholders. Site investigations will take place to determine environmental and geotechnical constraints.

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