Addenbrooke’s roundabout

Addenbrookes1

Work on the Addenbrooke’s roundabout started on Monday 12 May 2025 and will run until Friday 20 June 2025.

The works aim to improve safety for people walking and cycling and provide a much easier to navigate roundabout with less risk to all users. 

The central island of the roundabout will be reduced to allow for the carriageway to be widened, which in turn will allow for paths and crossings to be widened for people walking and cycling.

The work will begin with overnight single-lane closures to allow traffic to continue to flow whilst works are completed. The roundabout will remain accessible from all directions during the works, and emergency services will not be affected.

Further work is due to take place on the Fendon Road arm of the roundabout later this summer.

Update w/c 26 May 2025

The site team has undertaken a range of works to the roundabout, including taking core samples to look at the road’s layers and removing the existing road markings in preparation for new markings to be painted at the appropriate time.

They have also:

  • Excavated trial holes to locate the Cadent gas pipeline.
  • Completed drainage surveys to inform ongoing groundworks.
  • Cleared vegetation to allow the main works to start.
  • Started widening the inner ring of the roundabout to increase carriageway width.
  • Started work to remove the existing traffic signal poles and chambers in readiness for the installation of new traffic signal infrastructure.
  • Temporary traffic signals will be installed and commissioned to maintain traffic flow during the removal of existing signals.

All traffic management equipment, such as cones, will be removed during daylight hours.

The team will be clearing the site and taking drainage samples. Work will also start on the traffic signals at the roundabout ahead of new signal controllers being put in place to make the traffic light sequencing more efficient. There will also be some minor excavations.

The programme remains on target to be completed within the allotted eight weeks.

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Designs

addenbrookes diagram

The designs reduce the size of the central island to accommodate the upgraded walking and cycling links, while retaining the width of the lanes in the road for motorised vehicles, with the roundabout being used at all times by emergency services.

The design reflects consultation feedback, with the reintroduction of the informal crossing point on the Fendon Road arm and an enhanced two stage crossing of the southern arm of the roundabout.

It's intended that the scheme will be implemented by the end of 2025, and on this basis it’s secured additional funding from our partners at the Cambridgeshire & Peterborough Combined Authority.

The consultation feedback report and updated design plans can be found below.

Addenbrooke’s roundabout updated design

Addenbrooke’s roundabout consultation documents