Norway Rogfast Tunnel Project (Statens vegvesen via BTB Kommunikasjon)

Toto Costruzioni Generali CREG TBM galleria Cefalù (photograph resource is Toto Costruzioni Generali media release https://totospa.it/news-e-comunicati/tbm-margherita-al-via-la-costruzione-della-galleria-cefalu/

map- Panama Metro Line 3 (map El Metro de Panama)

Deutsche Bahn Berlin S-Bahn S21 (Deutsche Bahn Berlin S-Bahn S21 youtube project video)

Ferrovial PR High Speed Train (Ferrovial PR)

LTA CRL1 Tampines North station (LTA)

LTA CRL1 Defu station (LTA)

Qatar Main Drainage Tunnel by Ashghal

Túnel del Toyo (Túnel Guillermo Gaviria Echeverri) from INVÍAS

Hundvåg tunnel (Photo:Statens vegvesen)