South West - Maintenance schemes

Our surveys have revealed large numbers of dead or dying Ash trees. These are a potential safety risk to people on or near our road network.

We need to remove or make safe ash trees identified as needing urgent action.

Closures

We'll need a combination of overnight lane and carriageway closures while we work. Our next work (s) will be:

Monday 3 November for approximately 5 months

• A38 from Lee Mill to Exeter

Tuesday 9 and Wednesday 10 December 2025 - M4 Leigh Delamere slip road

Closed overnight.

24 November - 12 December 2025

• M4 junctions 17 - 18

If necessary we'll put signed diversion routes in place.

Please remember that closures can change at short notice. You can check the latest information on our daily closures page or find live travel information on our Traffic England site. Our travel alerts give details of live incidents on our network

In support of our Net Zero Highways Plan, we are upgrading 70% of the existing bulbs in road lighting lamps to LED by March 2027. 

Closures

We'll need overnight lane closures while we work. Our next work will be:

26 January - 31 March 2026
A30 Penzance to Cheriton Bishop

16 February - 20 March 2026
A38 near Plymouth, Liskeard, Landrake, Latchbrook and South Brent

16 March - 1 April 2026
A36 between Bath and Southampton 

Please remember that closures can change at short notice. You can check the latest information on our daily closures page or find live travel information on our Traffic England. Our travel alerts give details of live incidents on our network.

To work safely, we’ll use a combination of overnight:

• temporary two-way traffic lights along A388 Tavistock Road
• lane closures on the A30
• carriageway closures on the A30.

We’ll work weeknights (7pm – 6am).

Closures

Monday 12 January to Tuesday 10 February - A388 Tavistock Road 

Temporary two-way traffic lights overnight (7pm – 6am) on weeknights.

Thursday 5 February - A30 (A388 / A30 junction)

One lane westbound closed overnight (8pm - 6am).

Thursday 5 February - A30 eastbound carriageway between Tavistock junction and Lifton Down

Fully closed overnight (8pm - 6am).

Eastbound diversion: 

• at the junction with A388 turn left into Tavistock Road
• at the roundabout turn right into Tavistock Road
• at the junction turn right into Dockacre Road
• follow the A388 back to A30. 

Friday 6 and Monday 9 February - A30 (A388 / A30 junction)

One lane eastbound closed overnight (8pm - 6am) on each night.

Friday 6 and Monday 9 February - A30 westbound carriageway between Lifton Down and Tavistock junction

Fully closed overnight (8pm - 6am) on each night.

Westbound diversion:

• at the junction turn left into A388
• follow the A388 to the junction with Tavistock Road
• at the junction turn left into Tavistock Road
• at the roundabout take third exit into A30 westbound. 

The roads will be open as normal during the day and at weekends. 

Please remember that closures can change at short notice. You can check the latest information on our daily closures page or find live travel information on our Traffic England site. Our travel alerts give details of live incidents on our network.

We're refreshing the road markings and cat eyes at various locations along the A36 between Bath and Southampton to keep the road safe for drivers.

The work will take place weeknights only from Tuesday 16 September to February 2026 (8pm to 6am).

Dates may change at short notice due to poor weather conditions or operational reasons. If we’re unable to complete our work as planned, we may need to continue beyond the dates stated above. 

Well-signed diversions will be in place to help you plan alternative routes.

We know roadworks can be frustrating, but this work is vital to maintain safety standards on this busy route. By working overnight on weeknights, we're minimising disruption to your journeys.

Please remember that closures can change at short notice. You can check the latest information on our daily closures page or find live travel information on our Traffic England. Our travel alerts give details of live incidents on our network.

Works

We're resurfacing on the A36 between Norton Bavant and Deptford in Wiltshire to improve your journey and keep the road in good condition. 

To complete this work safely, we need to close parts of the road at different times between November 2025 and January 2026. 

Closure and Diversions

The A36 will be completely closed in both directions between Cotley Hill roundabout and Manor Road junction at Upton Lovell: 

• 3 to 28 November and 1 to 12 December (weeknights only, 8pm to 6am)

Full weekend closures:

• 8pm Friday to 6am Monday on 14-17 November, 21-24 November, and 28 November to 1 December

Deptford junction closures: 

• The slip roads at Deptford junction will be closed 5 to 28 January (weeknights only, between 8pm and 6am)

Diversion routes

When Deptford junction is closed: 

• If you're travelling towards Amesbury, follow the diversion to Wylye and re-join the A303
• If you're heading west from Salisbury, go by Longbarrow and Winterbourne Stoke to reach Deptford 

When the A36 is fully closed: 

• from Warminster - use the diversion at Cotley Hill Roundabout back along the A36, then join the A350 to re-join the A303 west of Chicklade 

From Salisbury:

• follow the same route in reverse 

This work depends on weather conditions, so dates may change. If we can't complete everything as planned, we may need to continue beyond these dates. 

Please remember that closures can change at short notice. You can check the latest information on our daily closures page or find live travel information on our Traffic England. Our travel alerts give details of live incidents on our network.

Works

We’re carrying out essential surveys on the A36 at Limpley Stoke. 

These routine surveys help us to ensure that the region’s roads are fit for now and the future. Our works will also reduce the risk of future unplanned closures.  

Closures

Tuesday 20 January (10am-3pm) at Limpley Stoke

We'll be using ‘stop / go boards’ to keep traffic moving in each direction for the lane closure. The road will remain open throughout. 

Delays are possible so please plan ahead and allow plenty of time for journeys. 

By working during the day we can complete the surveys as safely and efficiently as possible, with overall less disruption to the travelling public. 

This work is subject to favourable weather conditions. If we’re unable to complete our work as planned, we may need to return to complete the surveys at a later date. 

You can find live travel information on our Traffic England website: https://www.trafficengland.com/  or, our travel alerts give details of live incidents on our network: https://nationalhighways.co.uk/travel-updates/travel-alerts/.

We’re doing essential surveys on the A38 between Tamar Bridge and Forder Valley. 

These routine surveys help us to ensure that the region’s roads are fit for now and the future. Our works will also reduce the risk of future unplanned closures.   

One lane will be closed in each direction on the A38 on Sunday 25 January (7.30am – 6pm) between Tamar Bridge and Forder Valley. 

For a short period of time in the morning, the westbound lane closure will also extend up to the Marsh Mills junction. 

Significant delays are expected so please: 

• consider using alternative routes  
• If you choose to travel, plan ahead and allow plenty of time for journeys 

We understand lane closures can be frustrating. These surveys need to be undertaken during daylight hours.

We’ll be working at the weekend as this is when there’s the least amount of traffic on the road.

By working this way, we can complete the surveys as safely and efficiently as possible, with overall less disruption to the travelling public. 

Please remember that closures can change at short notice. You can check the latest information on our daily closures page or find live travel information on our Traffic England. Our travel alerts give details of live incidents on our network.

Bloor Homes and Montel Civil Engineering are developing land at Stoketon Cross for new housing.

This includes:

• a new access roundabout onto the A38
• two new access junctions.

Bloor Homes and Montel Civil Engineering will need traffic management at various locations while they work.

For more information, visit Montel Civil Engineering.

Works

We're renewing road markings and replacing road studs along stretches of the A38 between Kennford and Looe Mills from 7 November 2025 until spring 2026. 

We'll work in phases under overnight closures to keep disruption to a minimum.

Closures

The work will be carried out overnight Mondays to Fridays, between the hours of 8pm and 6am, however we'll aim to finish earlier if possible.

In order to carry out this work safely, there will be a combination of:

• overnight  lane closures (8pm to 6am)
• short sections of overnight carriageway closures (8pm-6am)
• temporary traffic lights
• convoy systems - you'll be escorted through works behind one of our vehicles at reduced speed

We'll signpost diversion routes, if needed, and maintain access for emergency services.

During the day the road will be open as usual but please plan ahead and allow extra time for your journeys.

Working dates may change at short notice due to poor weather conditions or operational reasons. 

We’ll make every effort to ensure the impact on local community and travelling public is kept to a minimum. Please accept our apologies in advance for any inconvenience this work may cause.

Please remember that closures can change at short notice. You can check the latest information on our daily closures page or find live travel information on our Traffic England website. Our travel alerts give details of live incidents on our network.

We're investing almost £6million to improve the A46 between Cold Ashton roundabout and London Road junction roundabout.

Our works will improve safety, make journeys more reliable, and reduce the need for future unplanned closures. 

This year, we'll be undertaking several essential schemes on the A46, including:

Phase one (Sunday 18 January – Friday 20 March)

• Geotechnical surveys at Charmy Down
• installing new and upgraded chevron signage at Hartley Bends

To find out more and to keep up to date with our works on the A46, visit our dedicated webpage.

You'll find more information ion this scheme on our page Safety schemes in the South West region.

Closures

A46 southbound carriageway between A46 Cold Ashton roundabout to A46 London Road junction

Closed overnight (midnight - 5am) on:

• Monday 1 December 2025
• Friday 19 December 2025
• Monday 5 January

We'll maintain access to properties on the A46 directly within our closure. 

Southbound diversion by:

• A420 (towards Marshfield)
• A350
• A4 (towards Corsham / Box)

1 to 19 December 2025 - southbound layby at Charmy Down

Temporarily closed to vehicles.

Please remember that closures can change at short notice. You can check the latest information on our daily closures page or find live travel information on our Traffic England site. Our travel alerts give details of live incidents on our network.

Work

The M4 will be closed westbound overnight on the 21 January between junctions 20 and 22 for two maintenance schemes:

• Renewing white lines and studs (cats eyes)
• Loop cutting (laying wire to monitor traffic flow and feed data into traffic systems)

Closures and diversions

The Severn Bridges will be accessible with a signed diversion route via junction 18 of the M5.

Prince of Wales Bridge Access:

• Southbound traffic exit the M5 at junction 18 to St Brendan’s roundabout
• Take the M49 northbound and rejoin the M4 at junction 22 for the bridge

If you're travelling M5 northbound after junction 18:

• exit the M5 at junction 15 and take the M4 eastbound
• exit the M4 at J19, take the M32 to junction 1,
• rejoin the M4 westbound and,
• follow the M5 southbound diversion

Severn Bridge Access:

Follow the diversions above and:

• exit the M5 at junction 18 to St Brendan’s Roundabout
• take the A4 Crowley Way,
• then A403 and rejoin M48 at junction 1

26 and 27 January

To complete the work to renew white lines and studs we'll close:

• M4 overnight eastbound between junctions 22 and 21 

Traffic exiting the Severn Bridges eastbound will need to follow the signed diversion route via the M49 and M5.

For further information about other works on the Severn Bridge, please visit the Severn Bridges travel updates page.

Work

We’re resurfacing and doing patching works on the M5 southbound carriageway between junctions 9 and 14. 

This will maintain and improve safety for everyone using the road and reduce the need for any unplanned closures.

We’ll do this work on weeknights between 8.30pm and 6am, when there is less traffic on the road, starting from Tuesday 25 November.

The road will be open as normal during the day and at weekends.

Closures

Monday 19 January 2025 (8:30pm-6am)

• M5 southbound junction 11 entry and exit slip road closure

Diversion

Drivers exiting M5 southbound at junction 11 will be diverted on to leave by: 

• M5 southbound junction 12 exit slip
• re-join M5 northbound by junction 12 entry slip road
• leave M5 northbound at junction 11 exit slip road

Drivers looking to join the M5 southbound at J11 will be diverted to:

• northbound J11 entry slip
• leave via M5 northbound J9 exit slip
• rejoin M5 southbound via entry slip at J9

Tuesday 20 January (8:30pm – 6am)

M5 southbound J11 exit slip road

Diversion

Drivers exiting via M5 southbound J11 will be diverted on to:

• M5 southbound J12 exit slip
• rejoin M5 northbound via J12 entry slip
• leave M5 northbound via J11 exit slip

Thursday 22 January (8:30pm – 6am) 

M5 southbound J12 exit slip road

Diversion

Drivers exiting via M5 southbound J12 will be diverted on to:

• M5 southbound J13 exit slip
• rejoin M5 northbound via J13 entry slip
• leave M5 northbound via J12 exit slip

Please plan ahead and allow extra time for your journeys. 

This work is subject to favourable weather conditions, for example heavy rain may affect the progress. 

If we’re unable to complete our work as planned during the above dates, we’ll update this page.

Please remember that closures can change at short notice. You can check the latest information on our daily closures page or find live travel information on our Traffic England. Our travel alerts give details of live incidents on our network.

We'll keep three lanes open in each direction with a speed limit of 50mph for most of our works

Closures

We'll need overnight closures to install traffic management:

20 and 21 October 2025 - M5 southbound between junctions 25 and J27

• two lanes closed overnight (8pm – 6am)

22 to 25 October 2025 - M5 northbound between junctions 27 and 25

• two lanes closed overnight (8pm – 6am)

25 to 27 October 2025 - M5 north and southbound between junctions 27 and 25

• two lanes closed overnight in each direction (8pm – 6am)

27 to 31 October 2025 - M5 northbound between junctions 27 and 25

• full closure overnight (9pm - 6am)

28 October 2025 – 20 February 2026

• northbound speed limit of 50mph 24 hours a day

1 to 2 November 2025 - M5 southbound between junctions 25 and J27

• two lanes closed (9pm - 12am) 
• all three lanes closed (12am-6am)

2 to 3 November 2025 - M5 southbound between junctions 25 and J27

• full closure overnight (9pm-6am) 

2 November 2025 – 12 February 2026

• southbound speed limit of 50mph 24 hours a day

9 to 10 November 2025 - M5 southbound between junctions 25 and J27

• full closure overnight (9pm - 6am)

1 to 6 December 2025 - M5 northbound between junctions 27 and 25

• full closure overnight (9pm - 6am)

6 to 8 December 2025 - M5 southbound between junctions 25 and J27

• full closure overnight (9pm - 6am)

13 to 15 December 2025 - M5 southbound between junctions 25 and J27

• full closure overnight (9pm - 6am)

20 to 21 December 2025 - M5 southbound between junctions 25 and J27

• full closure overnight (9pm - 6am)

2 to 3 January 2026 - M5 southbound between junctions 25 and J27

• full closure overnight (9pm - 6am)

11 to 12 February 2026 - M5 southbound between junctions 25 and J27

• full closure overnight (9pm - 6am)

14 - 15 February 2026 - M5 southbound between junctions 25 and 27

• full closure overnight (9pm – 6am)

19 – 23 February 2026 - M5 northbound between junctions 27 and 25

• full closure overnight (9pm - 6am)

22 - 25 February 2026 - M5 southbound between junctions 25 and J27

• two lanes closed overnight (8pm – 6am)

25 - 28 February 2025 - M5 northbound between junctions 27 and 25

• two lanes closed overnight (8pm – 6am)

Diversions

We'll put signed diversions in place from  M5 southbound junctions 25 to J27 and M5 northbound junctions 27 and 25 by the A38 and A358.

Please remember that closures can change at short notice. You can check the latest information on our daily closures page or find live travel information on our Traffic England site. Our travel alerts give details of live incidents on our network.

Work

We’re resurfacing sections of the M5 southbound carriageway between junctions 28 to 31. This includes the junction 31 exit slip which links the southbound M5 to the A30. 

We’ll be carrying out this work by full weekend and weeknight closures. This is when traffic levels are at their lowest.  

Full weekend closures

During the full weekend closures, our teams will be working 24/7.

The M5 southbound junction 31 exit slip will be closed: 

• from 8pm on Friday 9 January until 6am on Monday 12 January, inclusive
• from 8pm on Friday 16 January until 6am on Monday 19 January, inclusive 

The M5 will be open as normal during these works.

The southbound M5 junction 31 entry slip (that joins the A38) will also remain open throughout.

Weeknight closures

Monday 12 to Thursday 15 January (8pm-6am)

• M5 southbound between junctions 28 to 29

Friday 16 January

• lane closures will be in place
• one lane will be open southbound between junctions 28 to 29

A well signed diversion will be in place for southbound traffic looking to re-join the M5 at junction 29:

• take B3181, Cumberland Way then Honiton Road (A30)
• re-join the M5 at junction 29

Monday 19 to Friday 23 January (8pm-6am)

• M5 southbound junction 31 exit

The M5 southbound (junction 28 to 31, including the junction 31 exit slip) will be open as usual during the day.

The M5 southbound junction 31 entry slip (that joins the A38) will remain open as usual.

A well signed diversion will be in place for southbound traffic looking to join the A30:

• continue southbound on the M5 - this becomes the A38
• exit the A38 exit slip at Kennford
• take the bridge over the M5
• re-join the A38 northbound
• take the exit slip to join the A30 

Monday 26 to Tuesday 27 January (8pm to 6am)

• M5 southbound junction 29 entry and junction 30 exit slip

Diversion for M5 if looking to join southbound at junction 29 will be by:

• Moor Lane to join at Junction 30

Diversion for A3052 if looking to exit M5 southbound at junction 30 will be by:

• junction 31 exit
• A30 to Alphington to return to Junction 30 by M5 northbound to exit at Junction 30

Wednesday 28 January (8pm to 6am)

• M5 southbound junction 30 exit slip

Diversion for A3052 if looking to exit M5 Southbound at Junction 30 will be by:

• junction 31 exit
• A30 to Alphington to return to Junction 30 by M5 northbound to exit at Junction 30

Thursday 29 to Friday 30 January (8pm to 6am)

• M5 southbound junction 30 entry slip

Diversion for M5 South will be by:

• the M5 north to join M5 south at junction 29 via A30

There may be additional lane closures on the M5 junctions 28 - 29 between the 2 – 6 February to finish any work on this scheme which couldn’t be completed due to the weather.

Please plan ahead and allow extra time for your journeys. 

Dates may change at short notice due to poor weather conditions or operational reasons.

If we’re unable to complete our work as planned, we may need to continue beyond the dates stated above.

Please remember that closures can change at short notice. You can check the latest information on our daily closures page or find live travel information on our Traffic England. Our travel alerts give details of live incidents on our network.

Works

We’re replacing several of our motorway gantry signs in the region. 

We’ve planned a combination of overnight lane closures and full slip road closures (8pm-6am). 

Closures

Monday 12 January

• M4 junction 18 eastbound exit slip road closure
• there will also be lane closures on the M4 eastbound approaches to junction 18

Diversion by junction 17.

Tuesday 13 January – Thursday 15 January

• M4 junction 18 eastbound 
• only one lane will be open each night on the approaches to junction 18

Friday 16 January

• M5 junction 18a southbound exit slip closure (8.30pm-6am). 

Diversion by junction 19

Monday 19 January and Tuesday 20 January

• M5 junction 18a northbound 
• only one lane will be open each night on the approaches to junction 18a

Thursday 22 January

• Avonmouth spur from Portway Roundabout to M5 J18a northbound entry slip / M49 link will be closed.
• Diversion for M5 northbound and M49 via St Brendan’s roundabout. Via M5 southbound to J19, return M5 northbound 

Friday 23 January  

• M5 J18a northbound exit slip closure (9pm – 6am). The exit slip links the M5 northbound onto the M49 northbound
• Diversion via M5 northbound J15, M4 westbound J22

Monday 9 February and Tuesday 10 February

• Avonmouth spur from Portway Roundabout to M5 J18a northbound entry slip / M49 link will be closed.
• Diversion for M5 northbound and M49 via St Brendan’s roundabout. Via M5 southbound to J19, return M5 northbound 

All diversion routes will be well signed.

Please plan ahead and allow extra time for your journeys. 

Dates may change at short notice due to poor weather conditions or operational reasons. If we’re unable to complete our work as planned, we may need to continue beyond the dates stated above. 

Please remember that closures can change at short notice. You can check the latest information on our daily closures page or find live travel information on our Traffic England. Our travel alerts give details of live incidents on our network.