Preparatory works for the future Building 140 will begin on 17 August 2026 and are scheduled to continue until 18 December 2026. This initial phase includes the diversion of existing utility networks and the installation of new networks required to serve the future building.

To keep traffic flowing throughout this phase, Route Bakker will first be temporarily widened. This arrangement will ensure that at least one traffic lane remains open at all times, while maintaining a safe route for pedestrians.

Several temporary traffic and parking changes will be introduced during the works. Pedestrian access will be maintained throughout. Cyclists are requested to follow the traffic lanes and arrangements applicable to vehicles.

Impact on traffic and parking

17–31 August	One-way traffic on Route Bakker, from Route Wu towards Route Marie Skłodowska-Curie.
1–14 September	The roundabout connecting Route Bakker, Route Bloch and Route Marie Skłodowska-Curie will be partially closed. Alternative traffic arrangements will be put in place to allow traffic to pass through the roundabout. Route Bakker will be reopened to two-way traffic during this period.
15–30 September	Approximately 25 parking spaces in the car park on Route Scherrer, close to Route Bakker, will be temporarily unavailable.
30 September–7 December	One-way traffic on Route Bakker, from Route Wu towards Route Marie Skłodowska-Curie
8 October–17 December	Approximately 15 parking spaces in front of Buildings 155 and 166, as well as 10 spaces on Route Cavendish, will be temporarily unavailable.

Following the completion of the utility works, a second phase of preparatory works is planned for the first quarter of 2027. This phase will include the demolition of Building 25 and the removal of the remaining slab from the previously demolished Building 102. The main construction works for Building 140 are expected to begin in mid-2027.

Strategically located at the heart of the Meyrin campus, Building 140 will serve as a central and highly visible landmark, strengthening the connection between key areas of the campus. Further information about the project is available on the Building 140 project website.

The dates given here may be subject to minor adjustments. Further updates will be communicated as the project progresses. Download the CERN Campus app to receive the latest campus notifications.