Measurements, tests, commissioning and acceptance

We provide support for the commissioning and the initial operation phases of ventilation installations; we plan and support the execution of ventilation tests for certifying functionality. By means of our comprehensive measurement and testing equipment we execute fire and smoke tests as well as aerodynamic and climate measurements in tunnels.

Fire and smoke tests in tunnel

Air velocity measurement in the tunnel tube


Gotthard and Lötschberg base tunnel

Climate simulations


Train station Luzern Allmend

Real fire tests (warm smoke)

Metro station Marienplatz, Munich

Safety and ventilation concept


Jungfrau railway tunnel

Smoke extraction and smoke control


High-speed train TGV-Duplex

Aerodynamic measurements on open track

Engelberg railway tunnel

Smoke extraction and smoke control


Hauenstein base tunnel

Ventilation during refurbishment



Tunnel ventilation


Tunnels of the Transjurane A16

Tunnel ventilation

Tunnel Branisko

Tunnel ventilation

Gotschnatunnel, bypass Klosters

Tunnel ventilation

Tunnel Richard-Strauss Munich

Tunnel ventilation


Flüelen tunnel

Tunnel ventilation


Balmenrain and Uznaberg tunnels

Tunnel ventilation

M5East Tunnel Sydney

Exhaust air filter


Kö-Bogen Tunnel, Düsseldorf

Services related to the tunnel ventilation

Tunnel Wimpasing, bypass Ampfing

Detailed design, functional tests and fire tests

HBI has the high level of competence and broad experience required to serve as an independent inspection entity. The service that includes assessment of the safety and scrutiny of the safety documentation is targeted to assist in particular the administrative authority. The EU-Directive 2004/54/EC dated 29 April 2004 on minimum safety requirements for tunnels in the trans-European road network prescribes that a safety documentation has to exits. Moreover, the organization shall persist of various entities with clearly defined roles and responsibilities: administrative authority, tunnel manager, inspections entity and safety officer.

Investigating body 2004/54/EC