Austria has a long tradition in the construction and operation of road and rail tunnels, a field where user safety and accident response management are becoming ever more important. Building upon the past success, this international symposium once again offers the possibility to exchange knowledge and to gain deeper insight into the newest developments in the following fields.

The focus is put on:

• Ventilation in Underground Transport Systems
• Risk Analysis like evaluation of safety related measures
• System Tests for the commissioning of road and railway tunnels and recurring tests during operation
• Refurbishment and Upgrading of tunnels under operation
• Vehicles powered by Alternative Propulsion Systems
• Operational Aspects for Sustainable Energy Consumption
• Resilience of Tunnel Infrastructure