Abstract
The Norwegian Directorate of Public Roads has been responsible for an expansive development of tunnels on the national road system. An understanding of how tunnels influence traffic behaviour is essential in order to ensure that tunnels provide safe and comfortable conditions for road users. This article summarizes the experience that has been gathered in Norwegian tunnels so far. Even though the results concern specific tunnels with typical Norwegian design, they should be applicable in many other countries where design standards and traffic levels are higher. La Direction des Routes de Norvège est à l'origine d'un développement important des tunnels sur le réseau routier national. Il est essentiel de comprendre comment les tunnels influent sur le comportement pour assurer aux usagers des conditions de sécurité et de confort. L'article fait la synthèse des expériences recueillies en Norvège jusqu' à présent. Même si les résultats concernent des tunnel spécifiques de conception typiquement norvégienne, ils peuvent être appliqués à de nombreux autres pays où les normes de dimensionnement et les niveaux de circulation sont supérieurs.
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