Road Tunnels

Abstract

The manuals pertaining to the Public Roads Administration are given pursuant to the regulations relating to the Roads Act concerning highway construction. This Design manual applies to all types of road tunnels. The manual apply for new tunnels but do not apply retrospectively. Initially, the manual shall apply in respect of upgrading of safety aspects of existing tunnels. Any deviation from the specifications in the norm must be approved by the Directorate of Public Roads. The manual replace those stated in the edition of August 1992. The manual cover all aspects of the planning of a tunnel project, from the early planning stages to completion of the project, together with operation and maintenance. Tunnels comprise a considerable part of the highway network in Norway. Particular attention is given to the environment relating to the requirements of nature conservation and the urban environment. Tunnel construction implies long-term maintenance. It is important therefore that the choice of solutions and technical equipment is made on the basis of lifeexpectancy where operation and maintenance costs are evaluated. Compared to the 1992 edition, most chapters have been largely rewritten. A number of subjects which may be considered to fall outside the manual material have been included with regard to accessibility. Reference is also made to other norms and guidelines rather than these texts being copied here. Work with revising the design manual was undertaken in the period 1997 - 2001. Regional offices, consultants, constructors and others have made important contributions. The Design Manual will be available on the Norwegian Public Roads Administration´s internet pages www. vegvesen.no. The Directorate of Public Roads, June 2003. Responsible Department: Road Development Departm