Patent ID: 7699507

Claim:
An optical signaling apparatus for use in, particularly in low visibility conditions, wherein a roadway comprises at least one traffic bearing surface with at least one edgeline, the apparatus comprising: a plurality of light-emitting means for emitting respective laser beams; support means designed to be arranged along the roadway for supporting said plurality of light-emitting means; optical means designed to be arranged along the roadway and to interact with said beams generated by said plurality of light-emitting means, said optical means being provided in different units from said light emitting means; wherein said optical means are designed to selectively conform and project said beams in a first direction incident on the at least one edgeline, and wherein the incident beams projected in said first direction are so conformed that laser light materialized in air suspension has a form of a saw-tooth barrier that operates as an optically signaling wall.