A55 J16A Dwygyfylchi Junction

Layout and signage

Penmaen-bach        

Lane configuration

LanesLanesLanesLanes

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

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What's new

Where did the M25 come from?

London’s notorious orbital motorway turns 40 years old today. Where did it come from - and why the number “25”?

The long way round

When a road is closed, why isn't the diversion route just the quickest way past the closure?

Signs and sensibility

The one great attempt to make London’s streets logical - and how one retired chauffeur’s favourite routes changed the way you get around the capital.

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British Roads FAQ

The most Frequently Asked Questions where British Roads are concerned, and the answers. A good place to start if you're new to the subject or you're looking for quick facts.

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