M271 and A35 Redbridge roundabout upgrade

An upgrade to the Redbridge roundabout. This will include a dedicated left-turn lane for traffic leaving the M271 to access Southampton docks and city centre.

Start date Started
End date Autumn 2020
Cost £12 - £14 million

Latest updates

  • 16 October 2020

    Upcoming works

    From Monday 19 to Friday 24 October, we'll be installing new acoustic fencing at various locations during daytime hours. At some times this may be noisy and we apologise in advance for this. We will do our best to minimise any disturbance caused.  We hope that the end result will result in be a much quieter roundabout for local residents.

Project information


We announced our recommended design for this scheme, referred to as our “preferred route”, in 2017. When we decided on this route we took into account the feedback you gave us during our public consultation in 2016.

For the preferred design, Redbridge roundabout will include the following:

  • a segregated left turn lane for traffic leaving the M271 and going towards the port. This includes moving a toucan crossing further from the roundabout to increase visibility and improve safety
  • a new replacement pedestrian footbridge
  • a new lane for traffic heading north on the M271 from the Port and City
  • refurbishment of the northern subway at Gover Road
  • closure of the southern subway - this will be compensated for by a new toucan crossing over the roundabout carriageway
  • a new southern cycle path
  • paths to support all pedestrian and cyclist movements across the roundabout

Before developing our initial proposals for the Redbridge roundabout, we looked in detail at the problems that road users currently experienced, as well as the opportunities that an enhanced junction would create.

The M271 is an international route and is used by large volumes of heavy goods and holiday traffic. Long distance traffic from the M27 and M3 and conflicts with local traffic from Southampton City. We predict that the existing M271 Redbridge roundabout will suffer from congestion and long delays in the future if additional capacity is not created.

The aims of this scheme are to:

  • deliver a more free-flowing network by relieving traffic congestion, improving capacity and reducing journey times
  • provide a safer and more accessible environment for pedestrians and cyclists
  • enhance the environment through public space improvements and landscaping
  • reduce road traffic noise and tackle air quality by enabling free flowing traffic and resurfacing carriageways
  • improve equality, diversity and inclusion for all users by improving pedestrian, cycle and bus facilities, and enhancing overall safety and security at the roundabout
  • support economic growth by improving access into Southampton


Traffic information

Information about scheduled roadworks and events on our motorways and major roads.

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