Vertical Road Marking (Construction And Repair Of Protective Barriers And Fences For Pedestrian Traffic; Repair, Construction And Supplementation Of Fences For Herpetofauna; Delivery Of Road Signs; Installation, Repair And Disassembly Of Vertical Signs, Elements Of Gantries And Supporting Structures, And Installation And Replacement Of Guide Posts) On Roads National Gddkia O. Białystok