Crossroads icon with stick figure and bicycle and words 'crossroads with lights'

A4095 / B4100 Banbury Road roundabout improvements

We are converting the existing roundabout into a signalised junction with traffic lights to improve traffic flow and encourage more walking and cycling.

Join our February information event

Find out more about the construction schedule and traffic management plans. Meet the team and ask questions.

  • Date: Wednesday 28 February, 2024
  • Time: 10am to 1pm and 3pm to 6.45pm
  • Where: Emmanuel Church, 2 Barberry Place, Bicester OX26 3HA

About the project

Image of the Banbury Road roundabout work

Revised design following review of project in 2022

Bicester is one of the fastest-growing towns in Oxfordshire and the Banbury Road roundabout is a key junction along the Bicester ring road which was identified as a site for improvement in our Local Transport Plan.

The junction must be able to safely handle the number of vehicles travelling in the area, when new homes and jobs come to the town, and provide improved facilities that encourage more people to walk and cycle.

We are redeveloping this junction, and the planned work will:

  • convert the existing roundabout into a signalised junction better able to cope with increased traffic levels
  • improve safety for cyclists and pedestrians, with segregated cycleways and crossings at the western and southern arms of the redesigned junction
  • increase capacity, helping to address congestion
  • maintain access for drivers making a right turn from Fringford Road
  • incorporate a reduced speed limit of 30mph.

What you can expect

We will work in phases to remove the existing roundabout island and construct the improved junction.

We expect construction to start on 7 February 2024 and finish on 18 February 2025.

The timeline and detail of this work may change, due to the complexity of the project, any unrecorded utility cables or pipes that may be discovered in the ground and weather conditions.


Dates Location Activity Day/night Traffic management
7 February to 11 April 2024 Fringford Road Road closure 24 hours, 7 days a week Traffic diverted via B4100 using three-way traffic lights and narrow lanes. See map below.
15 April to 21 May 2024  Existing roundabout Remove existing roundabout and islands Day time, 7 days a week A route will be available around the roundabout via narrow lanes and temporary traffic lights.

12 April to 9 July 2024


B4100 Banbury Road northbound Works associated with widening of the southbound approach of the B4100  24 hours, 7 days a week Temporary traffic lights removed with narrow lanes still in place. Temporary pedestrian crossings in place.
10 July to 14 October 2024  Banbury Road  Road closure 24 hours, 7 days a week Traffic towards Bicester diverted both ways via the ring road.
15 October 2024 to 22 January 2025 A4095 westbound Works associated with widening of the northbound approach of the B4100  24 hours, 7 days a week Banbury Road re-opened to traffic. Narrow lanes in place. Temporary pedestrian crossings in place.
23 January to 30 January 2025 B4100 Road closure, road surfacing Night time Diversion via B4100 up to B430 and onto the ring road
Until 14 February 2025   Finishing and electrical works completed as required  Daytime  Localised traffic management

Diversion route in place from 7 February to 11 April 2024 when Fringford Road is closed.

The first stage of work will involve Fringford Road being closed, from 7 February to 11 April. Vehicles will be diverted by the B4100 using three-way traffic lights and narrow lanes. Pedestrians and cyclists will be diverted by Skimmingdish Lane, then down Buckingham Road/ the A4421 and finally turning into the A4095.

Image showing diversion routes of the works

We will try to keep delays to a minimum. For some journeys, you may prefer walking, cycling, using public transport, or changing your journey during this time.

Read more detailed information about the Banbury Road roundabout project (pdf format, 3.7 MB). The timeline and detail may change, due to the complexity of the project.

Night works during March

Monday 11 March to Friday 15 March 2024 between 8pm to 6am.

We will be removing one traffic island on the west side of the roundabout and replacing it with fill material up to road level.

Extra cones will be placed and removed along Lords Lane to maintain safety.

We aim to schedule the loudest tasks before 11pm and we will erect noise barriers as needed during noisy activities to mitigate disturbance.

We will be monitoring every stage and taking measures to minimise any disturbance or inconvenience.

How can I stay up to date?

This web page will be updated regularly, including with information about local events where you can ask questions about the work.

We recommend signing up to our travel and transport bulletin

Satellite navigation systems (SAT-NAV) will display updates on the road closures which could help when planning journeys.

Traffic management arrangements are also available by visiting

Designing and developing the improvements – 2020 to 2023

Activity Date completed
Feasibility and preliminary design, consultation December 2020 - June 2021
Planning granted 16 November 2021
Trial hole investigation work completed 18 February 2023
Detailed design Winter 2023
Amendment to planning application submitted Winter 2023
Procurement of works Winter 2023

How it is being funded

The scheme budget for the improvements is £10.7m. The Department for Levelling Up, Housing and Communities are providing £5.5m, with £5.20m secured from the Growth Deal. The money can only be used for this scheme.

Contact us

If you would like to get in touch, please email or write to Oxfordshire County Council, County Hall, New Road, Oxford, OX1 1ND. You can also register your interest in receiving updates about the work.

More information

Why are these improvements needed?

With more than 6,000 new homes planned for the local area, data forecasting shows that the current roundabout will not be able to safely handle the volume of predicted vehicle traffic. The redesigned junction will improve safety for drivers, cyclists, and pedestrians by regulating traffic in a more structured way using signals and lower speed limits.

What will the new junction look like?

The existing roundabout will be converted into a signalised junction. We are adding segregated crossings and paths for pedestrians and cyclists at the western and southern arms and reducing the speed limit to 30 miles per hour.

Why does the speed limit need to reduce?

Due to the crossing and raised table included in the new design, it is a legal requirement to reduce the speed limit to 30 miles per hour.

Why are you trying to encourage more walking and cycling?

Encouraging more people to walk, cycle or take public transport if they can is a key ambition of our local transport and connectivity plan. The redesigned junction will have better pavements and cycle paths and safer crossings, to help us achieve this.

How did you decide on the design?

An online public consultation on the initial three design options was held from 19 March to 9 April 2021. You can read the findings of the consultation in full (pdf format, 3.5Mb).

A member-delegated decision was made to take option two and develop it into a signalised junction with additional provision for safe cycling.

Further changes were incorporated following a review of the scheme in 2022 and additional stakeholder engagement in 2023. The change of design was approved at a cabinet member delegated decision meeting in October 2023.

As we hav worked on the design, we have used consultation and planning application feedback, technical assessments and data modelling, safety reports, and a cost review to inform our thinking. We also considered council policies.

Why was the design changed?

Emerging cost pressures led to a review of the scheme in 2022. The scope of the work changed, and we revisited the design to reflect this. The current design should save money and have a reduced impact on the surrounding land, while maintaining features such as segregated cycleways and crossings.

How is the current design different from the old design?

The current design increases the vehicular capacity of the junction to a similar level as options one and two from the original consultation, includes segregated cycleways and crossings that are an improvement on the existing provision, and has a reduced impact on the surrounding land, as we do not plan to widen the highway as much as originally planned. This avoids the potential requirement for compulsory purchase orders and expensive delays which could lead to funding expiring.

The design is compliant with guidance and two road safety audits have taken place.

What safety improvements will be made for cyclists?

Buffer zones between the cycle track and the carriageway have been incorporated on the north-western section which is a key area of vulnerability where traffic turns and where we expect most cyclists to travel.

The speed limit will also be reduced from 40mph to 30mph on all arms of the junction. 

When was planning permission granted?

Planning permission was granted in November 2021 for a signalised junction to replace the existing roundabout. We submitted a follow-up Section 73 application in 2023 to take account of minor changes required.

What engagement have you done?

We have used consultation feedback, planning application feedback and conversations with community representatives to help us make decisions as we developed these improvements. 

In 2021 we held a public consultation on three options for the redesigned roundabout. Further engagement took place with members and a community cycling group, including a June 2021 meeting with councillors.

Throughout 2023, we met with local interest groups as we finalised the current design.

An engagement event to provide information on the scheme was held for residents on 4 October 2023 to:

  • provide residents with an update on the progress of the scheme’s design
  • to explain the rationale behind the decisions made along with results from the modelling that supported the decision to deliver a signalised junction over a roundabout
  • to explain how the construction phase will be delivered and how traffic will be managed during the works
  • and answer any queries they may have on the design and construction process.

We have also engaged with various disability and access groups, local horse-riding societies and some local businesses.

When will construction start?

Construction is scheduled to begin on 7 February 2024 and finish on 18 February 2025.

What can I expect when the construction work starts?

During construction we will sometimes need to close roads, divert traffic, use narrow lanes, temporary pedestrian crossings and temporary traffic lights. A safe route around the junction for pedestrians, cyclists and horse riders will always be provided. Appropriate diversion routes for motorised traffic will also be in place.

An outline of the planned work can be found above, including maps of any current diversion route. The timeline and details may change, due to the complexity of the project.

How will you mitigate the environmental impact in the area?

The construction will be delivered in line with a Section 61 agreement – a formal agreement about how the work and its impact will be managed – reached between Cherwell District Council, Oxfordshire County Council and our contractor.

Vibrations: We don’t expect vibration to have an impact. This was assessed through ground investigation works.

Traffic congestion: A traffic and pedestrian management plan was produced and reviewed as part of the planning process. Our contractor assessed and mitigated the risks associated with the movement of vehicles, large machinery, and pedestrians (both site workers and members of the public) around the site.

Light pollution: We plan to install enough temporary lights to ensure the safety of road users is not compromised. We will maintain existing lighting levels around the junction and will not increase the light levels at night. Any flood lights installed in the compound will be angled down to limit light pollution.

How will you mitigate noise and air pollution in the area?

We will ensure that all tools are fitted with silencers and additional machinery and equipment are positioned furthest away from areas where the public could be affected and behind noise barriers. Noise will be reduced through planning, using quieter equipment, using anti-vibration mounts, training, and communication of and with the workforce. In addition to this, a noise monitoring system will be used to evaluate how our activities affect the surroundings.

To mitigate dust and air pollution, we will choose pre-made construction materials to reduce on-site activities. We will also use dust suppression equipment during the works.

Will there be enough space for cyclists, people with pushchairs, and people using wheelchairs or mobility aids to pass through during construction?

Yes, two metres of space will be provided and protected by barriers during construction.