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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 29 September

Works in the northeast quadrant (Fendon Road – A1307, Babraham Road) are now complete, and pedestrian access through this section has been reopened.

Pedestrian access between Hills Road and Fendon Road remains closed, with a clearly marked diversion in place, while works continue in this area.

As mentioned in last week’s update carriageway preparation is on schedule, with resurfacing due to begin on Monday 13 October. During this period, Fendon Road will be closed overnight from 8pm to 6am for one week while the roundabout is resurfaced and re-lined. Emergency services access will be maintained throughout, and the road will reopen each morning. Daytime access will not be affected.

The planned works for next week (6 October 2025) are:

  • Installation of fence barriers near Fendon Road and Hills Road South
  • Installation of traffic loop chambers
  • Resurfacing of all traffic islands

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