This Manual is available in English and in French, that are the only official versions, and also in other languages (today in Chinese, Czech, Japanese, Korean and Spanish). To go to one of these languages, you just need to click on the flag or the name of this language on the right top of the screen.

The Manual is divided in 3 parts :

• Home page (Warning to the readers), Preface and Introduction pages;
• 9 technical chapters;
• Glossary (Excel file with all the terms and definitions of the PIARC Road Tunnel Operations specific dictionary in all the available languages of this dictionary).

At the bottom of each page, you can find an hyperlink to a pdf file for the printing of this page and a pdf file for the printing of the full chapter.

On the top of the screen, you can also find a window for a tool "Search by Keywords". This facility is operational for the entire Manual, in each of the language of the Manual.

You can also find a "Contact" hyperlink on the top of the page that allows you to send your comments or questions to the members of the technical committee in charge of the Manual.

Copyright by the World Road Association. All rights reserved. Any reproduction even partial is forbidden without written authorization granted by the World Road Association.

World Road Association (PIARC)
La Grande Arche, Paroi nord, Niveau 5
92055 La Défense cedex, France

• The official versions of the Manual are the English and the French versions. The versions in other languages are translations of the official versions but these translations are not officially validated by PIARC.
• Although sections of reports are selectively referred to in this electronic resource, the actual meaning must be determined in the context of the original report - not the context of the electronically extracted web page.
• Where there is a conflict between the web site and the full report - the full report takes priority
• Publication on the web site is not a contemporary endorsement of the currency of the material and views contained in the earlier report.
• Specific inclusion in the web site does not add priority or authority to the original report.
• Where there is a requirement to comply with PIARC requirements as at a certain date, that date is determined by the date of first publication - not subsequent publication on the web site.
• Where a reference is made to another organisation or a web site hosting documents from such an organisation, the link does not constitute an endorsement of the specific recommendations contained at that link at the time it was published, or at any future time, unless and strictly limited to, the specific recommendation cited with approval in the tunnel handbook.

This Manual was designed to be a "live" document in order to be able to follow the frequent technological developments that are adopted from the design to the operation of the tunnels, and to be able to easily integrate the new reports that will be produced by the committee during following cycles. In this first version (2008-2011), the committee members have primarily endeavoured to define the structure of the Manual and to integrate into it, by means of new text or hyperlinks, the most relevant documents that already exist. Later, the old texts will be up-dated and up-graded as necessary and on this occasion the integration of their content within the Manual will be examined when appropriate.

All the updates are listed here below, starting from the initial version v 1.0 of the Manual in English from 25 September 2011.

1. First version v 1.0 25 September 2011:
   Are still missing in the Glossary of this version, the terms and definition of the PIARC Road Tunnel Operations dictionary translated in Czech, Chinese, Danish, Dutch, Farsi, Finnish, German, Hungarian, Japanese, Norwegian, Portuguese and Swedish. They will be added when available.