Road tunnels : standard [Manual 021E]
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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. 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 life expectancy where operation and maintenance costs are evaluated.
Håndboken er utgått. The manual is outdated.