A27 Langstone Interchange bridge safety work
We're performing essential safety and maintenance works on the A27 at Langstone Interchange.
Latest updates
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02 September 2026
New closure dates announced
A number of weekend events will take place in the Portsmouth and Chichester area during September.
We’ve amended our programme of weekend closures to make sure congestion is kept to a minimum over this period.
We've delayed the start time of our initial weekend closures to 9pm on Saturday evenings.
This should significantly reduce the impact on:
- the 5 September Portsmouth FC home fixture
- the final day of Southampton Boat Show on 26 September.
New closure dates and times are:
Eastbound weekend closures
9pm Saturday 5 to 6am Monday 7 September - A27 Langstone interchange eastbound
Full weekend closure.
Friday 11 September - A27 eastbound from Bedhampton to Emsworth
Closed overnight (9pm-6am).
Saturday 12 to Sunday 13 September - A27 Langstone interchange eastbound
Closed from 6am Saturday to 9am Sunday
Sunday 13 September - A27 eastbound from Bedhampton to Emsworth
Closed overnight (9pm-6am).
Westbound weekend closures
Saturday 26 September - A27 westbound from Emsworth to Bedhampton
Closed overnight (9pm-6am)
Sunday 27 September - A27 Langstone interchange westbound
Closed daytime (6am-6pm)
Sunday 27 September - A27 westbound from Emsworth to Bedhampton
Closed overnight (6pm-6am).
Friday 9 October - A27 westbound from Emsworth to Bedhampton
Closed overnight (9pm-6am).
Saturday 10 to Sunday 11 October - A27 Langstone interchange westbound
Closed from 6am Saturday to 9am Sunday
Sunday 11 October - A27 westbound from Emsworth to Bedhampton
Closed overnight (9pm-6am).
Weekday closures
Closed overnight (8pm-6am).
Monday 14 September – A27 Langstone interchange eastbound
Tuesday 15 September – A27 Langstone interchange eastbound
Wednesday 16 September – A27 Langstone interchange westbound
Thursday 17 September – A27 Langstone interchange eastbound
Friday 18 September - A27 Langstone interchangeMonday 12 to Friday 16 October - A27 Langstone interchange westbound
Diversions
A27 Bedhampton to Emsworth east and westbound diversion map
A27 Langstone interchange east and westbound diversion mapPlease note, the closures overnight on Monday 14 September and Tuesday 15 September will have alternative diversion routes which will be fully signposted.
Please remember that closures can change at short notice. You can check the latest information on our daily closures page. Our travel alerts give details of live incidents on our network.
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10 June 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
15 June to 25 August - A27 Langstone interchange
We'll need a mixture of eastbound, westbound and full closures overnight (9pm - 6am) on weeknights (Monday to Friday).
Diversion -
Most closures will just be a short diversion taking you off and back on at A27 Langstone interchange.However, on occasions there will be a slightly longer signed diversion route in place. This is due to additional works also taking place to the East of Langstone.
September – Full weekend closures
The A27 closes from 9pm Friday to 6am Monday on these dates:
- westbound – 4 to 7 September and 25 to 28 September
- eastbound – 11 to 14 September and 18 to 21 September
Avoid this stretch of the A27 if you can during these weekends.
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
Information about scheduled roadworks and events on our motorways and major roads.Sign up for updates!
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