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A40 London Road corridor improvements


Where A40 London Road in High Wycombe: from Abbey Way in the town centre to
the M40 J3 roundabout in Loudwater.
When Construction is starting August 2018 with planned completion by spring 2020.

The project objectives are to ease congestion, improve journey time reliability, improve air quality, manage the road network during an incident, and unlock economic growth on A40 London Road through a combination of:

  • junction improvements
  • introduction of new technology
  • optimisation of bus lane locations
  • bus stop improvements
Status Funding was awarded in late 2017 and the design for junction improvement schemes is currently underway. Construction for the traffic technology, monitoring and communications improvements will begin in August 2018. Construction for junction improvements will begin in spring 2019.

01296 382416

If you would like to receive information from Buckinghamshire County Council as the project progresses, please provide your contact details


About the project

The A40 London Road is an important route in the east of High Wycombe with a high volume of traffic on the route which currently causes congestion, particularly during peak times. The number of vehicles using the road is expected to increase in the future, making an already heavily congested route worse.

This project seeks to deliver improvements which will improve journey time reliability, ease congestion and as a result improve air quality.


Buckinghamshire County Council submitted a funding bid to the Department For Transport’s (DFT) National Productivity Investment Fund (NPIF) to tackle existing congestion problems, unlock housing and enable economic growth.

The total budget for the scheme is £6.644M made up from:

  • successful NPIF bid of £4.133 M
  • Local Transport Board (LTB) funding of £2.511M


Project improvements

The project will deliver a range of improvements along the A40 London Road including the introduction of new technology, junction improvements, bus stop improvements and the optimisation of bus lane locations.

The new technology equipment will be installed before the junction changes are made, and when complete will allow better management of traffic flows. It will also assist in the management of traffic during incidents on the network from the Council’s central control centre.

The improvements include:

  • linking all traffic signals along the London Road to allow control of flows on the corridor
  • upgrades to all pedestrian crossings with new and more efficient equipment.
  • CCTV (closed circuit television) for monitoring congestions levels
  • ANPR cameras (anonymised automatic number plate recognition) to monitor journey times
  • variable message signs to communicate improved messages to users


Project objectives

The combination of these technology improvements, the optimisation of bus lanes, and the junction improvements aim to deliver the main objectives of the project:

  • ease urban congestion (improve journey time reliability)
  • unlock economic growth and job creation opportunities
  • improve air quality
  • improved ability to manage traffic flows on the A40 when there is an incident on the highway network




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