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We want to address congestion issues on the M4 corridor between junctions 35 and 49.

Region / County:
First published:
22 November 2019
Last updated:


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.

Why we are doing it?

We want to improve the travel experience.

Current progress

We have completed the M4 junction 35 to 49 strategic outline case WelTAG stage 1 report.

Next steps

Short, medium and long term improvements have been identified. These will now progress to Stage 2 WelTAG study for further review.


Reports, environmental statements and plans