From PPD_STFC https://twitter.com/PPD_STFC on Twitter: #TBT The monorail in the LEP Collider Tunnel was used to transport people and equipment round the 27km long tunnel and could run at about 7 mph. The rail is now used by a remotely operated train, which unfortunately does not look half as stylish. https://twitter.com/PPD_STFC/status/1339495552535261187/photo/1 https://chirp.cooleysekula.net/attachment/69893