A41 Westcott Roundabout

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The project will replace the A41/ Westcott High Street junction with a four-arm roundabout, including a dedicated access road to Westcott Venture Park. Advance works started in December 2019 and the project will be completed by Autumn 2020.

Plan of A41 Westcott roundabout showing road widening improvements

Plan of Westcott Roundabout (JPG, 626KB)

This is a partnership project between Buckinghamshire County Council, Transport for Buckinghamshire, Buckinghamshire Local Enterprise Partnership, Aylesbury Vale Enterprise Zone, and Westcott Venture Park.


About the project

As an Aylesbury Vale Enterprise Zone site, Westcott Venture Park forms a key part of Buckinghamshire Local Enterprise Partnership's Local Industrial Strategy. Placed within the Oxford to Cambridge Arc, the site has the potential to become a major asset in the UK space programme programme and a hub for the development of 5G innovation technologies. However, highways capacity constraints mean the current site access is unsuitable for further expansion.

The A41 roundabout will enable Westcott Venture Park to move ahead with plans for a £3.2 million innovation centre, a high tech business space for world-leading space propulsion and satellite industries, as well as improving access to Westcott village and neighbouring settlements.


Aims and benefits

The project aims are:

  • unlocking development at Westcott Venture Park with the potential to become a national centre for aerospace research 
  • improving road safety at the A41 junction, enabling safer access to Westcott village
  • discouraging HGV movements through Westcott and neighbouring villages


Works programme

With the exception of a two-week overnight road closure in September, access along the A41 and into Westcott village will be maintained at all times throughout the works programme. A reduced speed limit of 40mph will be in place during construction. Work will take place between 7am and 5pm weekdays. 

For more details on upcoming works, check our bulletin.


Date of works Description and traffic management Duration
December 2019 to January 2020

Initial utilities diversions and site set-up.

Occasional traffic lights on Westcott High Street.

6 weeks
3 February 2020 to 27 March 2020

Construction of south-west quadrant of the roundabout.

Occasional two-way and three-way traffic lights for all works relating to A41 and High Street.

8 weeks
30 March 2020 to 8 May 2020

Construction of the south-east quadrant of the roundabout.
Occasional two-way and three-way traffic lights for all works relating to the A41 and High Street.

6 weeks
11 May to 29 May 2020

Construction of the north-west quadrant of the roundabout.
Two-way and three-way traffic lights for all works relating to the A41 and High Street.

3 weeks
1 June 2020 to 7 August 2020

Construction of a new Link Road into Westcott Venture Park.
Creation of temporary diversion route for Westcott High Street through Westcott Venture Park.
All works are within Westcott Venture Park. No traffic management impacts on public highway.

10 weeks
10 August 2020 to 21 August 2020

Construction of Westcott village arm of roundabout.
Closure of northern end of Westcott High Street. Diversion of traffic onto the new Link Road within Westcott Venture Park.
Occasional three-way traffic lights for all works relating to the A41.

2 weeks
24 August 2020 to 11 September 2020

Construction of the north-east quadrant of the roundabout.
Westcott High Street to remain closed.
Two-way and three-way traffic lights for all works relating to the A41 and High Street.

3 weeks
14 September 2020 to 25 September 2020

Final surfacing of the new roundabout.
Full overnight road closure (7:30pm to 6am)

2 weeks

High Speed 2 works

High Speed 2 Ltd plan to carry out signalisation works on the nearby A41 / Station Road junction at some point during the construction of the new Westcott roundabout. Exact timings for these works are not confirmed, but we are coordinating closely with High Speed 2 Ltd and their contractors to minimise disruption on the A41.

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