source of this graphics: https://kommunikasjon.ntb.no/pressemelding/tilbydergruppen-nordland-forbinde-trekker-seg-fra-ops-prosjektet-e10-halogalandsvegen?publisherId=17847490&releaseId=17940014&lang=no
China Railway Tunnel Group CRTG
https://www.prnewswire.com/news-releases/intelligent-systems-employed-in-constructing-chinas-deepest-undersea-tunnel-302127657.html
Mark Thurston, the CEO of Britain's mega project High Speed 2 (HS2).
source: HS2 media release https://mediacentre.hs2.org.uk/news/hs2s-ceo-to-step-down-after-six-and-a-half-years
HS2 Inside the Chiltern tunnel
HS2 Media release
source:
https://mediacentre.hs2.org.uk/news/hs2-chiltern-tunnel-florence-and-cecilia-reach-4-mile-point-at-chalfont-st-giles
Brennero Base TunnelTunnel Boring Machine Lilia side view
https://www.bbt-se.com/en/information/news/detail/news/tbm-lilia-starts-work-in-the-brenner-base-tunnel/