This report includes the Proceedings of the 7th International Symposium on Tunnel Safety and Security (ISTSS) held in Montreal, Canada, 16-18

th of March, 2016. The Proceedings include 59 papers given by session speakers and 9 extended abstracts presenting posters exhibited at the Symposium. The papers were presented in 17 different sessions. Among them are Emergency Management, Passive Protection, Case Studies, Safety Levels and Acceptable Risks, Fixed Fire Fighting Systems, Security and Safe Operations, Regulations, Testing and Design, Risk Analysis, Ventilation, Evacuation and Fire Dynamics.

Each day was opened by invited Keynote Speakers (in total six) addressing broad topics of pressing interest. The Keynote Speakers, selected as leaders in their field, consisted of Alexandre Debs, Ministére des Transports du Québec, Canada, Gary English, City of Seattle Fire Department, USA, Tony Cash, Transport for London, UK, Ahmend Kashef, National Research Council of Canada, George Hadjisophocleous, Carleton University of Canada and Harold L. Levitt, The Port Authority of New York and New Jersey, USA. We are grateful that the keynote speakers were able to share their knowledge and expertise with the participants of the symposium.