A36 Salisbury Corridor - planned road closures include Castle roundabout

News from National Highways

Planned closures (as advertised on 1 January 2026)

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 

Source: https://nationalhighways.co.uk/our-roads/south-west/a36-salisbury-corridor