Since 1957, date of creation by PIARC of the "Committee on Road Tunnels", the Association has conducted an ongoing activity on all matters relating to the operation of road tunnels: geometry, equipment and maintenance, operating, safety and environment.

The results of the committee's work were first published as:

• monographs on the occasion of the World Road Congresses, starting from 1959 (Rio de Janeiro Congress);
• then in the form of thematic reports from 1995 that can be found in the virtual library.

Knowledge is, since 2011, structured in an electronic form: the Manual of Road Tunnels, which presents various topics related to the operation of road tunnels and links to the various publications in this field.