WORLD`S LONGEST RAIL TUNNEL BEGAN REGULAR SERVICE IN SWITZERLAND.

THE WORLD`S  LONGEST AND DEEPEST RAIL TUNNEL OPENED IN SWITZERLAND, AFTER ALMOST TWO DECADES OF CONSTRUCTION WORK ON DECEMBER 9, 2016. THE 57 KM [35 MILE] TWIN- BORE GOTTHARD BASE TUNNEL WILL PROVIDE A HIGH- SPEED RAIL LINK UNDER THE SWISS ALPS  BETWWEN NORTHEN AND SOUTHERN EUROPE. THE GBT HAS SURPASSED JAPAN`S  53.9 KM TUNNEL AS THE WORLD`S LONGEST TRAIN SEIKAN  TUNNEL.