Skip to main content

We want to make improvements to the A470 at Llanidloes.

First published:
4 March 2021
Last updated:

For traffic news visit Traffic Wales.

The roads review considered this project

This page reflects our previous road investment programme. A new programme was published in the national transport delivery plan.

We will publish new scheme webpages to reflect the new programme.


Project status: planned/preliminary design (WelTAG stage 3)
Region/county: mid Wales
Start date: early 2023
End date: autumn 2023
Cost: £3.7 million
Technical advisors and designers: WSP
Registered with considerate constructors scheme: not yet

What we are doing

We want to introduce a Differential Acceleration Lane (DAL) off the existing Llanidloes roundabout. This will allow overtaking in the northbound direction along the A470 towards Llandinam.

Why we are doing it

We have identified a need to undertake safety improvements at existing junctions along the trunk road network.

Current progress

The scheme is reaching the end of the preliminary design stage. A WelTAG stage 3 report is being produced.


Award of consultant: winter 2016
WelTAG stage 1: 2017 to 2018
WelTAG stage 2: 2018 to 2019
WelTAG stage 3: 2020 to 2021
Preliminary design and preparation of orders: 2021
Detailed design: 2022
Construction: early 2023 to autumn 2023

How we are consulting

We are currently running a consultation on the proposals.

Next steps

We will consider the consultation responses. Following this we will recommend preferred changes to the scheme by spring 2021. 

Detailed design will begin in summer 2021.