Abstract

The present invention relates to road studs which can be grouped such that at least three road studs, each having a communication means, are arranged at the mutually adjacent distances so as to form a virtual area and determine whether or not a pedestrian has entered the virtual area. To solve the above problems, the present invention has an effect of providing information when a pedestrian is located at the correct place, by arranging at least three road studs, each having a communication means, at the mutually adjacent distances so as to form a virtual area and determine whether or not the pedestrian has entered the virtual area.

IPC Classes  ?

• E01F 9/673 - Upright bodies, e.g. marker posts or bollardsSupports for road signs characterised by means for fixing for holding sign posts or the like
• G01S 13/04 - Systems determining presence of a target
• G01S 11/06 - Systems for determining distance or velocity not using reflection or reradiation using radio waves using intensity measurements
• G01S 5/02 - Position-fixing by co-ordinating two or more direction or position-line determinationsPosition-fixing by co-ordinating two or more distance determinations using radio waves