M40 Junction 10 Padbury roundabout improvements

A project designed to increase the capacity of the A43 Padbury roundabout.

On this page

Why we are investing here

The scheme involves upgrading the A43 Padbury roundabout to improve the safety of the slip road and increase its capacity. This should also help to prepare the junction as planned housing is developed in the area.

The work will involve:

  • widening the existing nearside M40 junction 10 southbound off slip on the immediate approach to the roundabout to accommodate three running lanes
  • and changing the junction to have all approaches controlled by smart traffic signals.

The finished work will:

  • improve traffic flow in the local area and help the wider road network to meet current and future demands
  • reduce congestion and pollution around junction 10
  • improve road safety at the junction
  • and reduce journey times.

Timescales

We expect to start construction in July 2024 and finish in November 2024

What you can expect

To keep our construction programme as short as possible and to minimise disruption we will work off-peak from Monday to Friday between 8pm-6am.

There will be a single lane closure on the M40 southbound during the works and lane closures on the A43 northbound and southbound.

A 50 miles per hour speed limit will be in place on the slip road itself for the duration of the works.

During all road closures fully signed diversion routes will be put in place. All carriageways will be open as usual outside our working hours. 

How to stay up to date

Residents and businesses close to the site will be updated by letter before the work starts. This web page will be updated regularly.

We recommend signing up to our travel and transport bulletin . Select roads and transport (and anything else you may be interested in), and in your first email from us you’ll get the chance to tell us exactly which programmes you want to hear about.

When the work starts, satellite navigation systems (SAT-NAV) will display updates on the road closures which could help when planning journeys.

Traffic management arrangements will also be available by visiting https://one.network/

How it is being funded

The project is being funded by Housing and Growth Deal funding with National Highways delivering the work on behalf of Oxfordshire County Council.