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We are addressing network issues on this section of the A55.

First published:
2 July 2018
Last updated:


Project Status: in progress
Region/county: north-west Wales (Gwynedd)
Start date: autumn 2020
End date: spring 2022
Cost: £30m
Build contractor: Alun Griffiths Contractors
Designers: Ymgynghoriaeth Gwynedd Consultancy (YGC)

Why we are doing it

The A55 is the main north Wales coastal route and is part of Euroroute E22 Trans-European Transport Network (TEN-T). It is also an important link, via county roads, for local towns and communities and provides a connection with the north-south A470 to south and central Wales.

This section of the A55 was upgraded to a dual carriageway in the late 1960s and does not comply with current highway standards. The section is prone to flooding.

The scheme

We are improving safety along a 2.2km stretch of the A55 by:

  • removing direct accesses off the A55 
  • removing eight gaps in the central reservation

Gaps in the central reservation allow slow moving vehicles to cross the A55. This poses a risk to road users.

We are replacing these areas with:

  • combined access road 
  • active travel route between junction 12 and 13

We are improving the road's drainage system to reduce the risk of flooding in the area. Improvements have previously been made through drainage work carried out in 2017.

To minimise disruption, we will first complete most works off the A55. This includes construction of the 1.3km combined access and active travel route.

Current progress


Publication of draft orders: autumn 2016
Enabling works contract commencement: late 2018
Completion of enabling works contract: spring 2019
Start of main works construction: autumn 2020
Completion of new section of trunk road: spring 2022 

Next steps

A roadworks embargo will take place for the A55 works. Four lanes of traffic will remain open during the daytime. Temporary traffic management will take place in early 2021. Construction is due to complete by spring 2022.