The work includes the completion of engineering design services, mainly
work drawings and the execution of railway engineering work for the Østfold railway and
the Follo railway from the two altered tunnels at Oslo S, through a new tunnel in Klypen
towards the portal in Ekebergåsen. The track for the incoming Østfold railway continues
through the tunnel constructed by EPC D&B until the South Portal at
the Bekkelag tunnels. The outgoing Østfold railway track comes from the tunnel in Klypen
and will be joined to the existing tract at Loenga. The work also comprises the connection of all
railway engineering disciplines, including external signals with the existing track at Loenga,
Oslo S and new tracks in the portal in Ekebergåsen.