Overview
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ABSTRACT
Roads are to remain for a long time an essential component of the global transportation systems of persons and goods. It is thus essential that road networks provide the best quality of service. The aspects which have to be taken into consideration include making travel more comfortable and reducing the dramatic and extremely costly consequences of road insecurity; Reducing the environmental impact of road infrastructures and road traffic is evidently on the agenda. The choice of appropriate geometrical characteristics is one means in which to meet all of these objectives.
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Read the articleAUTHOR
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Jean BERTHIER: Engineer General of Ponts et Chaussées - Honorary Professor, École Nationale des Ponts et Chaussées
INTRODUCTION
The article
Even if the gradual reduction in fossil fuel resources, coupled with growing concerns about the rising greenhouse gas content of the atmosphere, lead policy-makers to support the development of alternative solutions, roads will continue to be a major component of the world's transport systems for a long time to come.
It is therefore essential to obtain the best possible service from road networks, and to achieve this :
make travel as comfortable as possible;
reduce the dramatic and economically devastating consequences of road accidents;
reduce the impact of road infrastructure and traffic on the environment.
The choice of appropriate geometric characteristics is one way of meeting all these objectives. This is the theme of the present article, which builds on the introductory elements of
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The roads
Bibliography
Websites
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CERTU – Center for studies on networks, transport, urban planning and construction
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ENTPE – École nationale des Travaux Publics de l'État
Regulations
Law no. 96-1236 of December 30, 1996 on air and the rational use of energy.
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Decree no. 2010-1390 November 2010. Various road safety measures amending the following articles :
article R 110-2 ;
article R 431-9 ;
article R 414-4.
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