The International Tunnelling and Underground Space Association held its forty-third meeting in Bergen, from 9 to 14 June 2017, in conjunction with the World Tunnel Congress 2017 "Surface challenges – underground solutions " organized by ITA and the the Norwegian Tunnelling Society. More than 1600 persons participated in the Congress. 52 of the 74 Member Nations participated or were represented in the General Assembly.

The International Tunnelling and Underground Space Association held its forty-second meeting in San Francisco, USA, from 22 to 28 April 2016, in conjunction with the World Tunnel Congress 2016 "Uniting the Industry" organized by ITA and the UCA of SME.

The International Tunnelling and Underground Space Association held its forty-first meeting in Dubrovnik, Croatia, from 22 to 28 May 2015, in conjunction with the World Tunnel Congress 2015 "Promoting Tunnelling in South East European Regionion" organized by ITA and the Croatian Association for Tunnelling and Underground Space - ITA Croatia.

The International Tunnelling and Underground Space Association held its fortieth meeting in Iguassu Falls, Brazil, from 9 to 14 May 2014, in conjunction with the World Tunnel Congress 2014 "Tunnels for a better life" organized by ITA and the Brazilian Tunnelling Committee.

The International Tunnelling and Underground Space Association held its thirty-ninth meeting in Geneva, Switzerland, from 1 to 5 June 2013, in conjunction with the World Tunnel Congress 2013 "Underground – the Way to the Future" organised by ITA and the Swiss Tunnelling Society (STS). 

The International Tunnelling and Underground Space Association held its thirty-eighth meeting in Bangkok, Thailand, from 18 to 24 May 2012, in conjunction with the World Tunnel Congress 2012 "Tunnelling and Underground Space for a Global Society" organised by ITA, the Thailand Underground and Tunnelling Group (TUTG) and the Engineering Institute of Thailand under His Majesty the King's Patronage (EIT).