The M49 motorway is a five-mile motorway in Gloucestershire to the west of Bristol, that forms a link between the M5 motorway at Junction 18, and the Second Severn Crossing, on the M4 motorway at Junction 22. It was constructed in 1996, at the same time as the bridge and is unique as it is only accessible from other motorways. Original plans provided for an intermediate junction with the A403, to serve an expanded industrial area and Severn Beach, but neither have come to fruition. The M49 is anomalously numbered, as it is entirely to the south of the M4, its number should therefore begin with a 3.
It begins at junction 18A of the M5 and then heads roughly north and north west before it reaches its terminal junction with the M4 at junction 22, just before the Second Severn Crossing. It cuts journey times for traffic to and from Avonmouth docks, Central and southern Bristol and the South West. Having a two-way grade-separated roundabout junction with the M4, it also fulfils the dual role of providing a bypass for the busy stretch of the M5 between the Avonmouth Bridge and the M4 in case of that route being shut.
|M49 motorway junctions|
|miles||North-west bound exits (B carriageway)||Junction||South-east bound exits (A carriageway)|
|0.0||Bristol, London M4(E)|| M4 J22
|The South West, Avonmouth M49|
|South Wales, Cardiff, Newport M4(W)||Start of motorway|
|5.3||Start of motorway|| Terminus
J18 & J18A
|Avonmouth, Bristol, Airport A4|
|South Wales, Cardiff, Newport (M4(W)) M49||The South West, Weston-s-Mare, M5|
|Motorways in the United Kingdom|
Great Britain: M1 • M2 • M3 • M4 • M5 • M6 • M6 Toll • M8 • M9 • M10 • M11 • M18 • M20 • M23 • M25 • M26 • M27 • M32 • M40 • M42 • M45 • M48 • M49 • M50 • M53 • M54 • M55 • M56 • M57 • M58 • M60 • M61 • M62 • M63 • M65 • M66 • M67 • M69 • M73 • M74 • M77 • M80 • M85 • M90 • M180 • M181 • M271 • M275 • M602 • M606 • M621 • M876 • M898 • Sections of A road: A1(M)
Former motorways marked in italics