Hagastaden station, Stockholm Metro (NCC)

Platform Hagastaden station, Stockholm Metro image: Region Stockholm/&Rundquist/3D HOUSE NCC press release

Brenner Base Tunnel image by BBE SE in a TU Graz press release

Grand Paris Express Line 16 Lot 3 Fayat Group

Keller image.

DPWH-JICA review meeting in Manila   photo https://pia.gov.ph/press-releases/releases/1067161

Kawasaki Super Green Mega Tunnel Boring Machine image of Kawasaki

HS2 Euston cevern From HS2 Media

HS2 Phase 2 Key Facts HS2 Media

Construction Karawanks Motorway Tunnel East Tube, Slovenia photo by DARS via Wikipedia https://en.wikipedia.org/wiki/File:Predor_Karavanke_Construction_Site_24.jpg