M27 Langstone Interchange bridge safety work
We're doing essential safety and maintenance works on the A27 at Langstone Interchange. These works are needed to keep this important route safe and reliable for the many thousands of people who use it every day.
Latest updates
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28 May 2026
Bridge safety improvements - what we are doing and why
We're replacing steel parapets, waterproofing, and expansion joints on both bridges.
Inspections found serious corrosion, worn waterproofing, and ageing joints causing noise for nearby residents.
Narrow lanes and reduced speed (22 June – 25 August)
Both directions will have narrow lanes throughout this period. A 40mph limit applies through the works.
Approaching from the A3 junction (eastbound) or Warblington junction (westbound), expect a 50mph limit.
Closures
Mid-June – late August, and September – Weeknight closures
The A27 at Langstone Interchange closes Monday to Friday overnight (8pm – 6am). A signed diversion will be in place.
September – Full weekend closures
The A27 closes from 8pm Friday to 6am Monday on these dates:
- Westbound – 4–6 September and 11–13 September
- Eastbound – 18–20 September and 25–27 September
Avoid this stretch of the A27 if you can during these weekends.
Diversions
Please follow all signed diversion routes.
Plan ahead
- Check traffic conditions before you travel.
- Allow extra time, especially during peak hours and the school summer holidays.
- Travel outside peak hours where you can.
Project information
Overview
We're doing essential safety and maintenance works on the A27 at Langstone to keep this important stretch of the A27 safe and reliable for the many thousands of people who use it every day.
Benefits
Once complete, these works will extend the life of both bridges, improve safety for road users, and significantly reduce the noise caused by the ageing deck joints – benefiting people living near the interchange.
This investment secures the A27 as a safe, reliable route for communities and businesses across the south coast for many years to come.
Documents
Traffic information
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