Due to works, from 17 June 2018 and for about 10 weeks, trams from Geneva centre will stop at Blandonnet.
Travellers are requested to leave the tram at Blandonnet and take shuttle 18 which will drive them to CERN (terminus).
Usual travel times from Geneva centre will be affected. Expect 40 minutes transport from Cornavin train station to CERN.
More information on Geneva Public Transports website (in French).