2. Data to be considered in projects
The definition of the road's geometric characteristics presupposes the prior selection of a certain number of basic data, the most essential of which are as follows:
traffic ;
project speed ;
stopping distances, overtaking distances and visibility.
2.1 Traffic
The level of traffic is the main factor to be taken into account when defining the cross-section of the roadway and, more generally, when choosing the type of layout to be selected. However, it covers a complex reality.
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Data to be considered in projects
Geometric characteristics in running section
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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