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 2 June 2025

Work is continuing to improve safety for all road users at Addenbrooke’s roundabout.

Last week, the site team worked specifically on two tasks. They prepared for the installation and commissioning of upgraded traffic signals which involved the fitting of new ducts and sockets while they continued to widen the carriageway by shrinking the central island.

This week, the team will be installing permanent poles for the new signals; the temporary traffic lights will remain on site until 11 June, when they will be fully decommissioned and removed. The permanent traffic lights will be switched back on the same day.

The team will also continue work on widening the carriageway.

We are pleased that the programme remains on target to be completed within the allotted eight weeks.

All traffic management equipment is removed during daylight hours, with the exception of cones on the newly-widened carriageway area. This does not impede the flow of traffic but protects the area the site team has worked on to date.

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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