A358 Taunton to SouthfieldsRecently updated

A dual carriageway link between the M5 at Taunton and the A303, part of a programme of improvements to the A303/A30/A358.

Region:  South West
Start date:  TBC
Cost:  £250 to £500 million
Type:  Major Scheme
End date:  TBC

What impact will this have on my journey?

For real time updates on closures, roadworks and traffic levels on England’s motorway and major roads network visit:

Traffic England

Progress report

Since the public information events were held in February we’ve been developing potential route options for the scheme.

We’re currently assessing all the options. Our assessment is based on the requirements set out by the Government, through the Road Investment Strategy, taking into account the cost, impact and benefits each of the options may have. To help inform this process we have had members of the project team on site investigating and assessing potential route options. This has included assessing the profile of the routes, potential environmental habitats or sensitive sites, traffic surveys and public rights of way usage.

We’ve also been having discussions with local stakeholders and statutory Environmental Bodies in the area. This is being done to make sure we take important local issues into account as we develop scheme route options.

What next?

We are currently examining the proposals and testing a range of options. We plan to ask for your opinion on these options.


Date Event
December 2014 Scheme announced
February 2016 Public information events
TBC Have your say

Why we need this scheme

The A303/A358 corridor is a vital connection between the south west, London and the south east. While much of the route is a dual carriageway, there are still over 35 miles of single carriageway. These sections act as congestion bottlenecks, particularly in the summer months and at weekends, causing delays to road users travelling between the M3 motorway and the south west and an increased risk of accidents.

The A358 itself comprises a mix of dual and single lane carriageway, This section also has poor junction alignment and visibility and changes in road type when compared against a high quality dual carriageway and expected of a key strategic route.

Ensuring that improvements are made to the A358 between Taunton and Southfields, to help traffic to flow more freely to and from the South West, is a priority. Without improvements that reduce congestion and journey times it will be difficult for the south west’s regional economy to expand and its communities to prosper.


The scheme will:
  • reduce congestion, improve journey times and make our network safer for our customers
  • support jobs and economic growth at a local and national level
  • minimise adverse impacts on the surrounding natural environment and landscape

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Project documents
A303/A358 autumn 2016 newsletter |

Project timeline

Planned roadworks

Roadworks and Events for England

The latest incident information for England's motorway and trunk routes provided by Highways England

Status : Pending. Lane Closures : Lane one will be closed. Schedule : From 10:00 on 25 January 2017 to 15:00 on 25 January 2017. Location : The M5 southbound entry slip at junction J25 . Lanes Closed : There will be one of two lanes closed. Reason : Roadworks are planned.
Posted: January 21, 2017, 1:31 pm
Status : Pending. Lane Closures : Lane one will be closed. Schedule : From 12:30 on 23 January 2017 to 16:30 on 23 January 2017. Location : The M5 southbound between junctions J26 and J27 . Lanes Closed : There will be one of three lanes closed. Reason : Roadworks are planned.
Posted: January 21, 2017, 1:31 pm
Period : expect disruption until 18:30 on 31 January 2017. Location : The M5 southbound between junctions J24 and J25 . Status : Currently Active. Lane Closures : The hard shoulder is closed. Reason : Road repairs.
Posted: January 21, 2017, 1:31 pm


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