River crossing icon

Didcot to Culham river crossing

The Didcot to Culham river crossing includes a new 3.6km single carriageway road between the A4130 at the existing Collett roundabout junction (Didcot) and the A415 at Culham with walking and cycling facilities. It will include a new bridge over the Appleford railway sidings and a new bridge over the River Thames.

About the project

The scheme will be to the west of the Didcot to Oxford rail line (Cherwell Valley railway line) and Appleford, and includes two new bridges, one over the River Thames and one over the Appleford railway sidings.

The new road will be a single carriageway, with walking and cycling facilities.

This scheme will also include:

  • Improvements at the existing A4130 Collett roundabout
  • A new priority junction with the B4016 west of Appleford
  • A new roundabout connecting the new link road with Appleford Road towards Sutton Courtenay.
  • New bus stops
  • A new roundabout on the A415 Abingdon Road


Your questions answered

Frequently asked questions.

Take a look at a flyover of the scheme

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Why we are investing here

The Didcot to Culham river crossing scheme will significantly reduce congestion in the area and ensure that the network is able to manage the development of new homes in and around the town. In particular, the scheme helps to relieve the congestion at the current river crossings through Sutton Courtenay / Culham villages, and also at Clifton Hampden. Traffic flows and congestion will also be reduced through Long Wittenham and Appleford villages.

The scheme will address the lack of connectivity created by the River Thames, which is a particular barrier to convenient and direct walking and cycling routes. It also helps cater for future north-south bus routes, which are currently impacted by congestion at the existing river crossings.

Timetable of activity
Activity Target date
Planning application submitted November 2021
Construction begins on site Spring/summer 2024