Almondsbury Interchange

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Almondsbury Interchange
Aerial photo of the Almondsbury Interchange
Coordinates: 51°33′05″N 2°33′09″W / 51.551432°N 2.552444°W / 51.551432; -2.552444Coordinates: 51°33′05″N 2°33′09″W / 51.551432°N 2.552444°W / 51.551432; -2.552444
Roads at

UK-Motorway-M4.svg M4 motorway

UK-Motorway-M5.svg M5 motorway
Constructed: 1964 by Richard Costain Ltd
Opened: 8 September 1966 (48 years ago) (1966-09-08)
Maintained by: Highways Agency
The RAC tower dominates the skyline at the Almondsbury Interchange

The Almondsbury Interchange in South Gloucestershire, is one of the United Kingdom's largest motorway stack interchanges. The interchange is one of only three four-level stacks in the UK, spanning a range of 0.5 km by 0.5 km. It is the interchange for the M5 at junction 15 and M4 at junction 20, and is situated at the northern fringes of Bristol close to the village of Almondsbury, the Aztec West industrial estate, and Bradley Stoke.

Almondsbury Interchange was the first four-level interchange in the United Kingdom.[1] It was designed by Freeman Fox and Robert Earley.[2] The interchange was built by Richard Costain Ltd, with work commencing in May 1964. The bridge was opened by the Queen on 8 September 1966.[3]

The interchange is often a traffic hot-spot, especially in the morning and evening rush hours.[4][5] It is overlooked by the RAC Tower. Traffic travelling northbound on the M5 intending to use the Second Severn Crossing (or those on the crossing wishing to use the M5 southbound from Avonmouth onwards) can bypass the interchange by using the M49 motorway.


  1. ^ "Oldest, widest, longest, highest". The Motorway Archive. Archived from the original on 3 October 2007. Retrieved 2007-10-04. 
  2. ^ Baldwin, Peter; Robert Baldwin (2003). The Motorway Achievement. Thomas Telford. p. 406. ISBN 0-7277-3196-3. 
  3. ^ "M4, Aust (J21) to Wickham (J14).". The Motorway Archive. Archived from the original on 8 October 2007. Retrieved 2007-10-04. 
  4. ^ "Almondsbury Interchange Safety Fence Upgrade". The Highways Agency. Retrieved 2008-08-05. 
  5. ^ "Bad Junctions - Almondsbury Interchange". CBRD. Archived from the original on 11 May 2011. Retrieved 2011-04-07.