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Addenbrooke’s roundabout

Addenbrookes roundabout aerial view

Work on the Addenbrooke’s roundabout safety improvements started on Monday 12 May 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.

Update: w/c 3 November

Civil engineering works in the southeast quadrant are progressing well, with fence barriers being installed and white lining now complete. Snagging corrections are also being addressed as part of the final quality checks.

Traffic signal installation continues to advance, we are scheduled to connect the permanent signals and remove the temporary system next week. The new signals are due to go live during the week commencing 17 November.

The week beginning 17 November is also when we are planning to install streetlighting columns, alongside a small section of resurfacing. In addition, we will be applying red asphalt at the signal stop lines to enhance cyclist safety and installing the memorial bike Sheffield stand.

We continue to work hard to minimise disruption and progress the project safely.

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.

Diversion routes 2025

Addenbrooke’s roundabout updated design

Addenbrooke’s roundabout consultation documents