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- W2217526188 abstract "In the context of the A88 Motorway concession between the cities of Falaise and Sees in France, the highway design team was confronted at the onset of the design work with a basic sight distance problem on the fast lane (used for overtaking) at critical points. Indeed, ICTAAL1 2000 states that motorway users must have good sight of the vehicles travelling on the fast lane and the slow lane (hardshoulder) at critical points, where speed differences are greatest and the risk of conflicts or accidents is increased. The alignment of the A88 Motorway includes radii of 1500m to 2500m which restrict the sight distance at roadside objects and cut slopes. In order to comprehend these problems from a functional perspective, an original and innovative method was developed to justify sight conditions by analysing the global travel data taking into account the road sections upstream and downstream of the project. In order to visualise the perception of the travel on these sections, an innovative modelling tool was developed: site recognition by a video film programme. The video film contains a safety analysis of the path of the driver on the upstream and downstream sections of the motorway. A video film assembly ensures that one sees through the driver’s eyes dynamically while driving along the alignment, together with a comment from the expert. A strict compliance to the standards would have prescribed widening the central reserve by 2-3m to satisfy the sight distance. However, the global approach implemented showed that the strict application of this extra-width was actually not needed, or could even increase the safety hazard in this particular context. In fact, the study showed that curve widening would create a dangerous situation where the driver would be encouraged to drive faster, and not only in the event of fog or snow. In the end, a balance was reached between the proposed geometrical road improvements to meet the standards and the interpretation of the behaviour of the driver using the motorway. The proposed road improvements were accepted by the Highway Authority. The perception of the infrastructure by the user, whose speed can be substantially controlled by road improvements, justified the approach about visibility and legibility compared to the over-comfort situation deemed unsafe." @default.
- W2217526188 created "2016-06-24" @default.
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- W2217526188 date "2011-01-01" @default.
- W2217526188 modified "2023-09-23" @default.
- W2217526188 title "Motorway A88 Falaise-Sees: an innovating geometrical design by Egis, designer for the project" @default.
- W2217526188 hasPublicationYear "2011" @default.
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