A36 Planned closures
- RW
- Feb 13
- 2 min read
Latest from the Highways Agency - 13 February
"We're continuing to make progress with the technology upgrades at the St Paul's and Castle roundabouts on the A36 in Salisbury.
Our teams are installing new equipment infrasctructure and preparing the area for the next stages of the work."
31 January
The Traffic lights have been switched off at Castle Roundabout.
'Give Way' signs are displayed at the junctions. From personal experience, the traffic has been flowing well (better than when the lights are working!) However, there have been reports and a photo on social media of a collision when a driver failed to 'GIVE WAY TO THE RIGHT' Ed.
Below are the details published by National Highways on 1 January 2026
All closures are subject to last minute changes.
Planned closures
Closures - Castle roundabout
19 - 29 January 2026
Full closures and lane closures overnight (8pm – 6am).
2 – 23 February 2026
Lane closures during the day.
14 - 27 July 2026
Full closures and lane closures overnight (8pm – 6am).
Closures - St Marks Roundabout
2 – 19 February 2026
Full closures and lane closures overnight (8pm – 6am).
2 – 23 March 2026
Lane closures during the day.
Closures - St Pauls Roundabout
1 – 22 June 2026
Full closures and lane closures overnight (8pm – 6am).
29 June – 20 July 2026
Lane closures during the day.
21 - 31 July 2026
Full closures and lane closures overnight (8pm – 6am).
How we'll work
To work safely, we’ll use a combination of lane and full closures during the day and overnight. Where needed, we'll put signed diversions 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.
"We're investing £23m to upgrade the A36 through Salisbury over the next six years.
Start date 19 January 2026 End date 2031"
Background
Around 33,500 vehicles a day travel between College and St Mark’s roundabouts in the heart of Salisbury.
We’re upgrading traffic signals at St Paul’s, Castle and St Mark’s roundabouts with modern digital systems. These new lights will react in real-time to the number of vehicles waiting. This will improve traffic flow, improve traffic sign reliability and reduce queuing, particularly during busy times of the day.
Our work also includes:
• improved road markings• resurfacing at St Paul’s and Castle roundabouts and part of Wilton Road