Didcot and surrounding area infrastructure improvements

Traffic Management notice 

As part of our ongoing work, we need to implement traffic management measures to safely carry out the activity.

Works access points

Works access points to allow vehicles to pull into the works areas will be installed on A415 and B4016 over the next few weeks. This will require some temporary traffic management.

A415 - 1 – 3 July 2026

This will be to create the access points for both the satellite compounds, as well as to provide a private access to Zouch Farm. 2-way temporary traffic lights will be in operation 24/7, however they will be manned during working hours to monitor traffic flow.

B4016 - 1 – 3 July 2026

There will be a single lane closure on the B4016 eastbound carriageway, with 3-way temporary traffic lights opposite the access to Heidelberg Materials. This is to facilitate works on the concrete bellmouth adjacent to the road. The lights will be in operation 24/7, however they will be manned during working hours to monitor traffic flow. 

Survey works

Ground investigation works - 4 July 2026

Ground investigation works of the Network Rail embankment will take place overnight on 4 July. This will require a lane closure on the A4130, which will be on the eastbound carriageway between 8pm - 8am.

Track monitoring – 11 July 2026

Installation of track monitoring equipment for the Network Rail infrastructure will take place overnight on 11 July.

Utility diversions

A number of utility providers are undertaking work to divert their service networks away from the area where we will be constructing the three sections of the scheme.

Thames Water (water) – 8 and 9 July 2026 and 27 July - 28 August 2026

Thames Water will need to undertake a trial hole on Milton Road in Didcot, to confirm that their assets do not clash with the new bridge foundations. 2-way temporary traffic lights will be in operation on the westbound carriageway on both 8 and 9 July. The lights will be controlled by a full-time operative during the day, to manage the traffic flow. The footpath will remain open.

From 27 July, for four weeks, there will be a single lane closure on the A415, between Europa School and Culham Station, with 2-way temporary traffic lights. This is to facilitate a Thames Water diversion.

SGN (gas) - May to July 2026

SGN will be working on the A415, with 2-way temporary traffic lights. 

Vodafone (telecoms) - until 3 July 2026

Vodafone is working on the A415, with 2-way temporary traffic lights. 

Cloud HQ (telecoms) 6 – 24 July 2026

Cloud HQ is working on the A415, with 2-way temporary traffic lights.

To reduce the impact to the network, all the temporary lights associated with the utility diversions, are operational between the hours of 7am and 7pm, with a person operating the lights on manual control.

Public Rights of Way

These temporary closures are needed to facilitate drainage works, earthworks, and highway construction, and to ensure the safety of both the public and the workforce. 

Clifton Hampden public right of way, March 2026 – September 2027

We have temporarily closed parts of footpaths 171/6/10 and 171/4/10 that lead to the west of the B4015 Oxford Road.  

The closure will remain in place for approximately 18 months. A fully signed diversion route will be in place for the duration of the closure.

Appleford public rights of way,  March 2026 – September 2027

We have temporarily closed and diverted the Appleford public right of way to the north of the B4016.

The closure will  last approximately 18 months. A fully signed diversion route will be in place for the duration of the closure.