Didcot and surrounding area infrastructure improvements

Traffic Management notice 

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

UKAEA roundabout traffic switch October 2026 - Spring 2027

As part of the ongoing construction of the new roundabout outside Culham Campus, we will need to put a traffic switch in place to allow us to continue with construction.

From 6pm on Friday 9 October until 6am on Monday 12 October, there will be no access to both Culham Campus and Culham No. 1 site. 

Once the traffic management is installed from the morning of Monday 12 October, the following changes will be in place:

• The A415/Station Road junction, leading to the Culham No. 1 site and Culham train station will be closed permanently.
• Culham Campus, Culham No. 1 site and Culham train station access will now be via the current A415/Culham Campus entrance and exit road (please note the current entrance junction remains unchanged, with both left and right turning).
• Pedestrians will now follow an altered diversion route.
• A temporary pedestrian footpath from the A415 heading north towards Culham Campus will be in place.
• A temporary bus stop for eastbound traffic will be in place on the A415, next to the footpath mentioned above. (Please note there are no changes to the westbound bus stop).

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.

BT Openreach (telecoms) 12 - 23 October 2026

BT will have 2-way temporary traffic lights on the A415 between Europa School and Culham Station.

CloudHQ (telecoms) 19 – 23 October 2026

There will be 2-way temporary traffic lights on the A415 between Temporary 2-way lights between Culham train station and Europa School

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.

Thames Path, August 2026 – January 2028

We have temporarily closed parts of the Thames Path between Culham Lock and the weir, to the northwest of Long Wittenham. 

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.