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We want to improve journey times, safety and reduce pollution.

First published:
10 January 2018
Last updated:

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Project status: planned
Region/county: north/south corridor
Start date: autumn 2017 (WelTAG Stage 1)
End date: early 2025
Cost: £50m
Contractors: to be appointed
Registered with considerate constructors scheme: not yet

Current progress

We completed a WelTAG Stage 1 appraisal that identified a short list of options. We consulted on the options in spring 2019. We reviewed responses to the consultation and identified 4 options.

In 2007 we protected a route through Llandeilo via a TR111 notice. This notice safeguards a corridor of land to prevent any development along it. Whilst this notice is still in place it has no bearing on the current WelTAG process.


Award of consultant: winter 2018
WelTAG stage 1: spring 2018 to spring 2019
WelTAG stage 2: spring 2019 to winter 2020
WelTAG stage 3: spring 2021 to spring 2023
Preliminary design and preparation of orders: summer 2020 to spring 2023
Detailed design and construction: around 24 months
Construction: around 24 months

How we are consulting

We will hold public forums at the end of each WelTAG stage. We consulted in autumn 2020.

Next steps

Following the consultation the independent review panel will consider all of your feedback and will recommend a preferred option by late 2020. 

Final recommendation by the minister is expected by winter 2021.