Hyperloop Webuild image coursesy by HiperloopTT
Webuild media https://www.webuildgroup.com/en/media/news/webuild-feasibility-study-futuristic-hyper-transfer-project-italy/
HS2 TBM Florence within the Chiltern tunnel
from HS2 media https://mediacentre.hs2.org.uk/news/tunnel-progress-as-hs2s-florence-and-cecilia-reach-chesham-road- scaled
CPK Long Distance High Speed Tunnel in Łódź, Poland
origin:CPK Media article The construction of the CPK long-distance HSR tunnel in Łódź has begun. The construction contract has now been signed – Centralny Port Komunikacyjny – CPK
Deutsche Bahn CO2 emmission comparisons
Deutsche Bahn Fürth Güterzugtunnel brochure from DB project Mediathek https://www.bahnausbau-nuernberg-bamberg.de/mediathek.html?file=files/theme/mediathek/DB_VDE8-1_Gueterzugtunnel-Fuerth_Januar2023_web.pdf&cid=330
From Wikicommons uploaded by Cooper - Geländerelief: NASA WorldWind 1.3 / Zeichnung: Cooper, Public Domain, https://commons.wikimedia.org/w/index.php?curid=3844544
Frederick-Douglass-Tunnel-with-Electrified-Trains
Amtrak media release https://media.amtrak.com/2024/02/amtrak-awards-contract-to-build-new-frederick-douglass-tunnel-in-baltimore/