Route Open Junctions Section
1 M4 Jan 1966 J18-20 Tormarton → Almondsbury
2 M6 Mar 1966 J11-13 Shareshill → Dunston
3 M1 May 1966 J24-25 Kegworth → Sandiacre
4 M4 Jul 1966 J39-41* Port Talbot Bypass Opened as A48(M)
5 M32 Sep 1966 J0-1 Hambrook Spur
6 M4 Sep 1966 J20-21 Almondsbury → Aust
7 M48 Sep 1966 Severn and Wye Bridges Opened as M4; became M48 in 1996
8 M6 Sep 1966 J10-11 Darlaston → Shareshill
9 M1 Nov 1966 J4-5 Brockley → Berrygrove
10 M1 Nov 1966 J25-26 Sandiacre → Nuthall
11 M74 and A74(M) Dec 1966 J5-8 Bothwell → Hamilton

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What's new

Imperfectly Odd: Batheaston Bypass

It has viaducts, a tunnel and plenty of controversy, but the amazing Batheaston Bypass doesn’t really work. What went wrong?

South London's lost motorways

Completing the story of London's epic Ringways, we've just published the Southern Radials, five more motorways that never saw the light of day.

To the north east!

Two new additions to our collection of Opening Booklets take us to Darlington and Middlesbrough.

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To the Limit

Speed limits are more emotive and divisive than almost anything else about the road network. How do you sort the fact from the opinion? And how did we end up with the speed limits we have?