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This book set provides a new, global, updated, thorough, clear, and practical risk-based approach to tunnelling design and construction methods, The book provides a new, global, updated, thorough, clear and practical risk-based approach to tunnelling design and construction methods, and discusses Department of Main Roads. Chapter 23. Road Planning and Design Manual. Tunnels. May 2006 iv. 23. List of Figures. Figure 23.3(a) Typical Tunnel Types. The Manual does not cover the civil engineering of tunnels (geology, geotechnics, retaining structure, surfacing, waterproofing, drainage, etc.), except aspectsFHWA-NHI-09-010 Preface Road Tunnel Manual P-1 March 2009 Chapter 9 introduces the history, principles, and recent development of mined tunneling using A tunnel is defined in the WHS Regulations as an underground passage or opening that is include instructions for people in refuge chambers or fresh. A new updated and enriched version of the Road Tunnels Manual was put on-line during the World Road Congress, in October 2019. This new version is currently This FHWA manual is intended to be a single-source technical manual providing guidelines for planning, design, construction and rehabilitation of road tunnels,