A421 Black Cat Roundabout

Layout and signage

The NORTH
Peterborough A1 Link
Cambridge (A428)
London
Stevenage A1 Link
Great Barford
 





A1
(A428)
   





A1
  N/A

Lane configuration

LanesLanesLanesLanes

  • Lane 1 terminates.
  • Lane 2 terminates.

LanesLanesLanesLanes

  • Lane 1 continues ahead.
  • Lane 2 continues ahead.

Other events

  • Signs 60mph speed limit begins
  • Signs National Speed Limit begins

In this section

What's new

All change

In July 2024, a new Government entered office with a very different set of priorities. What does it mean for a faltering roads programme?

A century of motorways

It's 100 years since the opening of the world's first motorway, the Autostrada from Milan to the Lakes.

Schrödinger’s speed limit

In 2022, Manchester City Council say they reduced the speed limit on the Mancunian Way to 30mph. But it’s not clear if they did. It’s not even clear if they can.

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Major incidents

What happens when there's a big accident on a trunk route? Who picks up the pieces, and why does it take so long?

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