Acciona TBM breakthrough in Line 9 of Barcelona, Spain source Acciona press release https://www.acciona.com/updates/articles/acciona-celebrates-new-breakthrough-line-barcelona-metro/?_adin=132415900

Femern AS First casting July 2023 source: Femern press media

LTA CRL Tunnels Between CRL Maju Station & Clementi Station https://www.lta.gov.sg/content/dam/ltagov/news/press/2024/240815_CRL_Loc_map_AnnexA.pdf

Source: Herrenknecht press release https://www.herrenknecht.com/en/newsroom/pressreleasedetail/herrenknecht-kehrt-an-den-gotthard-zurueck/

Guozi Robotics Smart inspection robots working undersea tunnel SOURCE Zhejiang Guozi Robotics Co., Ltd China

Guozi Robotics Smart inspection robots working undersea tunnel SOURCE Zhejiang Guozi Robotics Co., Ltd.

DPP Prague Metro D map

InnoTrans 2022 Tunnel Ventilation source: InnoTrans Photo section for press. To be used only for InnoTrans related posts. file:...

InnoTrans 2022 FOGTEC Fire Protection source: InnoTrans photo section for press. Only to be used in relevant articles for InnoTrans. file:...

InnoTrans 2022 Tunnel Cleaning Machines Brügger HTB GmbH / Railway Facilities Cleaning AG source: InnoTrans photos section for press. This upload of ímage can only be used for promoting...