Unpaved roads are built on the basis of soil compaction. Therefore, the operation of vehicles on these roads results in dust emissions. As the number of passing vehicles increases, the soil surface gradually degrades under shearing caused by the tires. This enhances emissions and reduces visibility, increasing health and environmental related issue...
Road markings visibility is usually assessed by means of the visibility level (VL). Several models have been developed to calculate the visibility distance on the road (Detect/PCDetect, Carve/Tarvip, Cost 331 and CIE 73). These models all approximate the visibility of a marking by estimating the diameter of an 'equivalent' disc. In this process, sp...
Introduction: Since the 1st October 2008, in France, all vehicles must be equipped with a safety kit including a high-visibility vest and a warning triangle. The main purpose of this measure was to improve the safety of pedestrians who are near vehicles that have broken down or have had a crash. The objective of the research presented in this paper...
Introduction: Since the 1st October 2008, in France, all vehicles must be equipped with a safety kit including a high-visibility vest and a warning triangle. The main purpose of this measure was to improve the safety of pedestrians who are near vehicles that have broken down or have had a crash. The objective of the research presented in this paper...
The use of visual performance models in road lighting is an old idea: it was first proposed in the 1930s by Waldram with the Revealing Power, and by Roper and Howard who used the notion of visibility distance. The Visibility Level (VL) concept was then proposed by Blackwell, and the Relative Visual Performance by Rea and Ouelette. At the turn of th...
La règlementation pour la signalisation arrière des trains de fret sur le réseau ferré français prescrit 2 lanternes fixes, qui seraient remplacées par des plaques rétroréfléchissantes sur la base d'un règlement européen. Dans certains cas où les conducteurs sont autorisés à conduire en marche à vue se pose alors la question de la visibilité de ces...
La communication présente un travail exploratoire portant sur un ensemble de cas d'études détaillées d'accidents (EDA ) nocturnes en milieu urbain, et visant à tester l'apport d'analyses photométriques pour la compréhension des dysfonctionnements perceptivo-cognitifs intervenant dans les processus d'accidents.
The aim of this study was to find out if the colour contrast of a vest worn by cyclists improved their visibility for motorists in a simulated car driving task. Background. In several cases involving collisions between cars and cyclists, car drivers failed to detect the latter in time to avoid collision because of their low visibility or sensory co...
La communication présente un travail exploratoire portant sur un ensemble de cas d'études détaillées d'accidents (EDA ) nocturnes en milieu urbain, et visant à tester l'apport d'analyses photométriques pour la compréhension des dysfonctionnements perceptivo-cognitifs intervenant dans les processus d'accidents.
The aim of this study was to find out if the colour contrast of a vest worn by cyclists improved their visibility for motorists in a simulated car driving task. Background. In several cases involving collisions between cars and cyclists, car drivers failed to detect the latter in time to avoid collision because of their low visibility or sensory co...
