This study is the third edition of a market survey compiling global figures of construction of tunnels over the world. One of the objectives is of course for stakeholders of the industry to know trends in the market as well as possibility of development for their own business. The ITAMember Nations (78 countries) have been involved in collecting the data prepared by ITA secretariat. In this analysis data are coming from 96 countries. Even with the help of ITA Member Nations, it is not meant to be a fully comprehensive market study but collecting more than 80 – 90% of what has been done in term of tunnelling works during the year. Altogether it represents over 4,200 projects.