Pedestrian crossings are critical points in terms of road safety because they tend to be characterized by high accident rates. Pedestrian safety at zebra crossings depends mainly on vehicles speed. In this study the effects of median refuge island and ''Yield here to pedestrians" flashing vertical sign on pedestrian crossing conspicuity were assessed with a before-after analysis of both speed and visual behaviour of drivers approaching to crosswalks. The elements of the pedestrian crossing that were more salient and how drivers' visual behaviour was related to speed were assessed analysing drivers' eye movements. The intervention significantly increased the fixation time to the zebra markings and the addition of the flashing light increased conspicuity and fixation time to the vertical sign. The median refuge island was glanced by 60.7% of the drivers. Distance of first-fixation of the crosswalk increased by 44.7%. Notwithstanding mean and V85 speed parameters were lower after the intervention , the effects on crosswalk visual attention were higher than on speed.

Effects of median refuge island and flashing vertical sign on conspicuity and safety of unsignalized crosswalks

Vignali Valeria
;
Cuppi Federico;Acerra Ennia;Bichicchi Arianna;Lantieri Claudio;Simone Andrea;Costa Marco
2019

Abstract

Pedestrian crossings are critical points in terms of road safety because they tend to be characterized by high accident rates. Pedestrian safety at zebra crossings depends mainly on vehicles speed. In this study the effects of median refuge island and ''Yield here to pedestrians" flashing vertical sign on pedestrian crossing conspicuity were assessed with a before-after analysis of both speed and visual behaviour of drivers approaching to crosswalks. The elements of the pedestrian crossing that were more salient and how drivers' visual behaviour was related to speed were assessed analysing drivers' eye movements. The intervention significantly increased the fixation time to the zebra markings and the addition of the flashing light increased conspicuity and fixation time to the vertical sign. The median refuge island was glanced by 60.7% of the drivers. Distance of first-fixation of the crosswalk increased by 44.7%. Notwithstanding mean and V85 speed parameters were lower after the intervention , the effects on crosswalk visual attention were higher than on speed.
Vignali Valeria, Cuppi Federico, Acerra Ennia, Bichicchi Arianna, Lantieri Claudio, Simone Andrea, Costa Marco
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/649986
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