M4 J48 Hendy Interchange

Layout and signage

Pontarddulais
Llanelli
A4138
  A4138     A4138   Pontarddulais
Llanelli
A4138

Lane configuration

LanesLanesLanesLanes

  • Lane 1 continues, with option to exit.
  • Lane 2 continues ahead.

LanesLanesLanesLanes

  • Lane 1 continues, with option to exit.
  • Lane 2 continues ahead.

In this section

What's new

The sunlit uplands

On Saturday 31 May something historic happened. The Heads of the Valleys Road was finally complete.

Grand openings

Our much-loved Opening Booklets section has two new publications for you to explore, and we’re making some overdue changes to make them easier to find and easier to read.

Silver bullet

The Silvertown Tunnel is finally open for business. One question remains: what’s it for?

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Junction Three

The M621 has one junction where everything leaves the motorway and heads for the city, and a very bizarre junction it is too.

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