Impact of Lorry Dynamics on infrastructure design
CEREZO ; GOTHIE ; JACOB ; DOLCEMASCOLO
Type de document
COMMUNICATION AVEC ACTES INTERNATIONAL (ACTI)
Langue
anglais
Auteur
CEREZO ; GOTHIE ; JACOB ; DOLCEMASCOLO
Résumé / Abstract
The design of a road infrastructure must take into account the type of vehicles, which will use it, above all with respect to the road safety. Indeed, Heavy Goods Vehicles (HGV) represent a significant part of the road vehicles, with specific geometrical and dynamic characteristics, which make them more aggressive to road wear and more sensitive to the road profile for stability and safety. This paper investigate geometrical and surface characteristics of the most critical road sections with respect to rollover and knife-jacking of lorries in curves or ramps. Several research projects recently investigated the impacts of the infrastructure design on lorry behaviour and accident risk. Studies of accidents allowed detecting dangerous road configurations. The analysis of these accident reports led to the reconstruct the accident mechanisms by using simulation software called PROSPER which contains a detailed lorry model in interaction with the road. After adjustment of the lorry model parameters and input of the road characteristics, the real causes of the accidents are explained and the implication of the infrastructure pointed out. HGVs dynamic behaviour simulations were carried out to calculate roll, pitch and yaw speeds and accelerations, and position of the centre of gravity with respect to the target vehicle trajectory and the road profile. This allowed determining threshold values for the speed, under which lorries can be driven without risk in curves. Finally these studies allowed determining design values for some road parameters with respect to traffic conditions or HGVs requirement.
