Frequently asked questions

Why are the schemes needed?

The schemes will provide vital transport infrastructure to reduce congestion and enable more reliable journey times, improve pedestrian and cycling connectivity, and support new employment sites and housing. It is currently expected that the project will directly unlock 11,711 new homes and support the delivery of more than 17,000 new homes in total in the Didcot Garden Town area. These future residential areas are located across 12 separate sites in and around Didcot in South Oxfordshire (SODC) and Vale of White Horse (VoWHDC) districts.

How much funding has been secured?

In March 2019 we secured a bid for £218 funding from the Housing Infrastructure Fund (HIF1) for these schemes. Developments in the area will also contribute to the cost.

What is the overall programme of works?

The planning application was submitted in November 2021. A decision on the application is expected in summer 2022 with the construction phase scheduled to start in spring/summer 2024. Construction is expected to be complete by mid-2026. Further details about the construction will be made available closer to the time.

How is the land being obtained for these schemes?

We will primarily attempt to obtain the land required through negotiation. However, should this not be possible, we may be required to use Compulsory Purchase Order (CPO) powers to acquire the land necessary to deliver the infrastructure schemes. Using the CPO powers is always a last resort.

What are the speed limits of these schemes?

  • A4130 Widening: 40mph
  • Science Bridge: 30mph
  • Didcot to Culham River Crossing: 30mph at the southern end, 50mph elsewhere
  • Clifton Hampden Bypass: 40mph at the southern end at the new roundabout, 50mph elsewhere

What about the impact on wildlife and the environment?

An Environmental Impact Assessment (EIA) has been carried out to ensure any impacts on the environment, wildlife and ecology are properly investigated and mitigated or avoided where possible in accordance with the applicable legislation. The EIA will also include the impact on the historic environment, an Air Quality Impact Assessment and Noise Impact Assessment. As part of the landscaping strategy, there is the potential for planting alongside some sections of the schemes.

Will construction traffic cause traffic disruption in Didcot?

There will be some disruption during construction, but through the implementation of a Construction Traffic Management Plan this disruption will be minimised wherever possible.

The construction of the four schemes will also be carefully phased in order to avoid, where possible, works taking place simultaneously in multiple locations on the existing highway network. During construction residents and businesses can check live road works on One Network for Oxfordshire County Council.

What type of pedestrian and cycle crossings will there be across the schemes?

The type of each pedestrian and cycle crossing depends on the nature of the environment, the anticipated usage, and the proposed speed limit in each location.

The next stages of design will further consider the appropriateness of each type of crossing, taking into account the comments received from the planning application, and further Road Safety Audits.

How can I find out more?

If you have any specific questions about the overall programme or its individual schemes, please contact the delivery team at