from PORR press release on 4/4/2023 https://porr-group.com/en/press/press-release/news/contract-awarded-for-lot-h53-pfons-brenner/

Surat Metro Map = Terratec media information https://terratec.co/NewsInfos/detail/105

HS2 TBM breakthrough in Warwickshire HS2 Media distribution.

HS2 Career Opportunities HS2 media release https://mediacentre.hs2.org.uk/news/hs2-launches-new-tunnelling-operative-career-opportunities

HS2 Chilterns Tunnel North Portal view looking north from HS2 media release: https://mediacentre.hs2.org.uk/news/hs2-reveals-final-design-for-last-of-seven-key-chiltern-tunnel-structures

from https://urbanutilities.com.au/newsroom/articles/mega-sewer-upgrade-begins-four-storeys-beneath-brisbane-streets-IqdpVGnSPUiPNt4raX5jqw

Statens vegvesen Tunnel rehabilitation image with press release: https://kommunikasjon.ntb.no/pressemelding/hab-skal-rehabilitere-tunneler?publisherId=17847490&releaseId=17958705&lang=no

HS2 Amersham vent shaft - HS2 Media release https://mediacentre.hs2.org.uk/news/hs2-tunnel-progress-as-florence-and-cecilia-pass-amersham

Toulouse Metro contract Implenia media release