Hundvåg tunnel (Photo:Statens vegvesen)

HS2 Plan new railway through Burton Green (HS2 media)

BFK Danube Tunnel  (BFK)

Oslo's E6 Rentvannstunnel Project (water tunnel project) Norway City of Oslo drawing.

Sydney Metro West (taken from Sydney Metro - Western Sydney Airport Sustainable Report and modified with extra info) Sydney Metro - Western Sydney Airport Sustainable Report:...

Tunnel Québec-Lévis diameter (drawing from Le Réseau express de la Capitale (REC))

Tunnel Québec-Lévis profile (drawing from Le Réseau express de la Capitale (REC))

Metrolinx Toronto Yonge North Subway Extension (Metrolinx)

Metrolinks Toronto Scarborough metro extension (map Metrolinx)

HS2 Precasts factory for viaduct (HS2 Media)