The Committee on Operational Safety of Underground Facilities (COSUF) of the International Tunnelling and underground space Association (ITA) was installed in May 2005 following a joint initiative of eight European research projects which all aimed at improved tunnel safety. Since then, COSUF has gathered among its members some of the most recognized experts, scientists and operators from all continents.

The Committee scope is safety in operation and security in tunnels and other underground facilities. ITA COSUF aims at improving and promoting safety and security underground, through networking activities and dissemination of technical culture and new knowledge.