When cones are placed on the roadway forming a row or alignment, what exactly do they prohibit?

Question

DentroTest · Accepted Answer

Cones are part of the road delineation elements (delimiting devices). According to the Official Catalog of Traffic Signs (Annex I of the General Traffic Regulations, 3.1.1), temporary edge beacons, cones and similar devices prohibit passage through the line, real or imaginary, that joins them. Prohibiting passage onto the road or onto the part of it being delimited is what the fixed delimiting device does, and prohibiting passage while also indicating the direction of traffic corresponds to the temporary directional panel, not to cones.

When cones are placed on the roadway forming a row or alignment, what exactly do they prohibit?

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