Risk analysis and security

For the design and operation of major infrastructure projects, quantitative and qualitative risk analysis becomes increasingly important. Risk analysis is used to optimise the safety concept with respect to costs and benefits. Furthermore, quantitative risk analysis is formally employed in order to evaluate the risk category for the transport of dangerous goods in road and railway tunnels or on alternative routes. Several different methodologies are used today. The selection of the appropriate method is made according to project related or national requirements.

Risk analysis

Reference list

Fires in underground transport system have to be considered at an early design phase of a project. Based on a comprehensive risk assessment and a useful combination of preventive and curative measures, it is important to find the optimum solution for a given project. Evacuation and rescue concepts are important requirements for a successful handling of underground fires.

Escape route planning and rescue concepts


Stuttgart 21, Filder station

Ventilation and escape route concepts


Tunnel Groene Hart, Dordtsche Kil and Rotterdam Noordrand

Efficiency of the emergency ventilation


Jungfrau railway tunnel

Smoke extraction and smoke control


Engelberg railway tunnel

Smoke extraction and smoke control


Research project REHSTRAIN

Aero-thermal conditions in rail tunnels

New or adapted norms and guidelines lead to changing requirements for tunnel constructions. Changes of the usage requirements can lead to new performance requirements. With the check of the functional and safety requirements of existing tunnels by HBI, the safety level is determined and the need for action and the measures to be realized are demonstrated.

Safety check​​​​​​


Young Dong railway tunnel

Ventilation and risk control


Tunnel Groene Hart, Dordtsche Kil and Rotterdam Noordrand

Efficiency of the emergency ventilation


Stuttgart city railway: U12 Hallschlag-Münster

Safety and ventilation concept


Augsburg mobility hub

Safety and ventilation concept


Tunnel Rheinufer Düsseldorf

Smoke extraction and keeping smoke-free


City Tunnel Freiburg

Technical safety risk analysis


Tunnel Böhämmer

Safety analysis


Kiesberg tunnel Wuppertal

Tunnel ventilation retrofit


Arlberg Street Tunnel

Expert opinion on tunnel safety


Gallery of Dormagen-Horrem

Risk-based safety evaluation


Lötschberg base tunnel

Ventilation and safety concept

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

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