The M31 was planned as a Reading to M3 motorway which was dubbed the 'M3 – M4 link motorway'. It would have provided a direct high-speed route between the two motorways. The motorway was planned at the same time as the largely unrealised London Ringways scheme and an additional section was planned that would have taken the M31 south and east from the M3 to connect to the scheme's Ringway 4 (now the M25) providing a shorter route for traffic travelling between the west and Surrey and Kent.

M31 shield
M31
Route information
Length22.0 mi (35.4 km)
StatusUnbuilt
HistoryNever built; partially completed as A329(M) and A3290
Major junctions
southeast end
M25 motorway
Major intersections
M3 motorway

M4 motorway
northwest endM4
Location
CountryUnited Kingdom
Primary
destinations
Bracknell
Wokingham
Reading
Road network

Only part of the planned route was built; it bears the designations A329(M) and A3290. Had the motorway been constructed it would have provided an alternative to the south-west section of the M25, reducing the motorway journey between Reading and Byfleet by approximately 10 miles (16 km) and alleviating traffic on what is the M25's busiest section.[1][failed verification][2]

References

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  1. ^ RAC foundation Archived 2007-08-29 at the Wayback Machine
  2. ^ Highways Agency Archived 27 September 2007 at the Wayback Machine
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51°24′58″N 0°48′15″W / 51.41602°N 0.80423°W / 51.41602; -0.80423