A35 Road and Bridge Essential Works (Redbridge Viaduct)

Last update: October 2017


Hampshire County Council is starting a programme of work on 4 November 2017 to repair the A35 Redbridge Viaduct and resurface the road to ensure the bridge can continue to be used by all traffic.

Redbridge Viaduct is a 50 year old bridge carrying westbound traffic out of Southampton over Test Lane, the railway and the river Test. Due to its age, the harsh marine environment and the large volumes of traffic that use this bridge it now requires essential repairs to the joints and concrete supports. The viaduct is made up of a series of 9 piers supported by 106 coloumns.

Phase 1 of the bridge works involve replacing the old expansion joints between each span, which, due to their deterioration are leaking and causing water to run down the supports and columns underneath. The leaking water has caused deterioration of these reinforced concrete supports and columns and repairs are now necessary to avoid the need for reduced weight limits being imposed for traffic crossing the bridge. Carriageway resurfacing will also be undertaken at the same time.

Work will start on Saturday 4 November 2017 in a number of stages which are detailed below. Each stage has been designed to cause the least amount of disruption possible taking into consideration Southampton football match times, cruise ship time tables and bus travel, although unfortunately it is not possible to cause zero disruption. Work will be put on hold during December and January to make way for Christmas shoppers and begin again in February. Concrete repairs under the structure will be completed at a later date once all the joints have been replaced.

Following discussions with our neighbouring highway authorities: Highways England and Southampton City Council, a full closure of the westbound-only carriageway (outbound from Southampton) between Redbridge roundabout and Rushington roundabout will be required and diversion routes will be in operation. A full closure is required to ensure the safety of the travelling public and the workforce in such a tight space and allows a more expedient construction operation that improves the quality of the new joints and minimises the number of closures and inconvenience for the public

Cyclists and pedestrians will still be able to use the causeway bridge.

Where the work is taking place

View map of where the work is taking place.

Redbridge location map

When the work is taking place

The nature of the works make them highly weather dependant and a decision whether to go ahead with the works will be made on the Wednesday preceding each of the dates below.

Phase 1 - November 2017

  • A35 Westbound closed at 8pm on Saturday 4 November to 5am on Monday 6 November
    During this period we will have a number of teams removing the old expansion joints and installing new ones with temporary surfacing over the top. At the same time teams will be working on resurfacing the carriageway between the west end of the Viaduct and the Rushington roundabout, cleansing the existing drainage system, carrying out repairs to road side barriers, weed spray/removal, minor kerb repairs and other routine maintenance operations.
  • A35 Westbound closed at 8pm on Saturday 11 November to 5am on Monday 13 November.
    Work will continue as detailed above.

Phase 1 – February and March 2018

We will return to site and close the road at 8pm on Saturday 3 February and will continue in the same manner as previous weekends.

  • A35 Westbound closed at 8pm on Saturday 3 February to 5am on Monday 5 February
  • A35 Westbound closed at 8pm on Saturday 10 February to 5am on Monday 12 February
  • A35 Westbound closed at 8pm on Saturday 17 February to 5am on Monday 19 February
  • A35 Westbound closed at 8pm on Saturday 24 February to 5am on Monday 26 February
  • A35 Westbound closed at 8pm on Saturday 3 March to 5am on Monday 5 March

Following completion of all of the Phase 1 works to the bridge expansion joints, a further two overnight closure will be required to resurface the carriageway on the westbound lanes of the bridge itself. As the dates for this cannot be programmed until all of phase 1 is complete, this will be confirmed nearer the time.

Phase 2 – March 2018 onwards

Resurfacing work will be carried out on the Eastbound carriageway from Rushington roundabout to (and including) the Redbridge Causeway starting in March 2018. This work will be undertaken under a full road closure Monday to Friday between 10pm and 5am, for approximately seven nights along with some daytime lane closures (weather permitting).

As with the phase 1 works, signed diversions will be provided to cater for non-motorway and motorway traffic. Additional routine maintenance operations such as drainage cleansing and sign cleaning will be carried out at the same time.

Phase 3 – Summer 2018

The final stage of the project is to repair the concrete supports underneath the bridge. This work has been provisionally planned for Summer 2018 but is not expected to have an effect on the traffic along the A35.

Diversion routes

Signed diversions will be in place during the weekend closures. The majority of drivers will use the diversion along M271, M27 and A326. For drivers who are not able to use the motorway the diversion will be via Romsey. The motorway diversion will increase travel by approximately 12minutes (8miles).

The eastbound route into Southampton will not be affected during the Phase 1 works.

View the diversion route

  • Name Highways Bridges
  • Email roads@hants.gov.uk
  • Phone 0300 555 1388 (0300 555 1390: Minicom)
Economy, Transport and Environment Department
Hampshire County Council
The Castle

SO23 8UD