image by Vann- og avløpsetaten/Oslo kommune

Location map of tunnel between Aviation Park Station and Loyang Station Courtesy of Singapore’s Land Transport Authority (LTA)

Hagastaden station, Stockholm Metro (NCC)

Hagastaden station, Stockholm Metro (NCC)

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

Grand Paris Express Line 16 Lot 3 Fayat Group

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

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

Construction Karawanks Motorway Tunnel East Tube, Slovenia photo by DARS via Wikipedia https://en.wikipedia.org/wiki/File:Predor_Karavanke_Construction_Site_23.jpg

Construction Karawanks Motorway Tunnel East Tube, Slovenia photo of DARS via wikipedia https://en.wikipedia.org/wiki/File:Predor_Karavanke_Construction_Site_22.jpg