![\"GRAIL-Figure1\"](\"https:\/\/segvauto.es\/wp-content\/uploads\/2021\/11\/GRAIL-Figure1-1024x497.jpg\")
\nFigure 1. Pedestrians waiting to cross at a pedestrian crossing while looking for eye contact with the driver of an oncoming car.
\nIn order to increase VRUs reassurance, the automated system developed by the University of Alcal\u00e1 (UAH) performs two actions in parallel that contribute to improve the interaction between the car and the VRUs. On the one hand, the vehicle starts to decrease its speed significantly as soon as those pedestrians are detected by the on-board camera system. On the other hand, the GRAIL system, an array of green diodes located in the front of the vehicle (as shown in figure 2), is turned on.
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![\"GRAIL-Figure2\"](\"https:\/\/segvauto.es\/wp-content\/uploads\/2021\/11\/GRAIL-Figure2-1024x495.jpg\")
\nFigure 2. GRAIL system shown in detail. An array of green diodes located in the front part of the vehicle is turned on whenever a VRU is detected on the curb.
\nThe combination of both actions, vehicle deceleration and green light coming on, provides a distinct sign to VRUs, indicating that the situation is safe for them to start crossing the street. In this regard, GRAIL is a unique interface between vehicles and VRUs aiming at providing an advanced and intelligent interaction between them, yielding an increase in road safety. The system has been successfully tested on the Campus of the University of Alcal\u00e1 (UAH), located in the city of Alcal\u00e1 de Henares (Spain). Likewise, it was exhibited and demonstrated in the conference that the SEGVAUTO project organized in Madrid in November 2016. Currently, GRAIL is being adapted and fine-tuned in order to be exhaustively tested in private proving grounds. Their contribution to road safety by means of an intelligent interaction between vehicles and VRUs is expected to become really relevant in the coming years, as long as car makers decide to integrate this technology in their mass-produced models. The operation of the GRAIL system is graphically illustrated in the video that can be seen at: https:\/\/youtu.be\/pfDrxVbVcto<\/a><\/p>","protected":false},"excerpt":{"rendered":"
Like the Holy Grail in the medieval times, the GRAIL system provides a long-sought solution for deploying an intelligent and efficient interaction between vehicles and Vulnerable Road Users (VRUs), namely pedestrians and cyclists. GRAIL stands for GReen Assistant Interfacing Light, aiming at increasing road safety and reassuring VRUs when crossing the street. Let\u2019s consider the […]<\/p>\n","protected":false},"author":1,"featured_media":14072,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[19,9],"tags":[20,21,22,23,24,25,26],"class_list":["post-13728","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-automocion","category-announcement","tag-active-safety","tag-cyclists","tag-grail","tag-interface","tag-pedestrians","tag-self-driving-cars","tag-vulnerable-road-users"],"yoast_head":"\n