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Grade separations (Pmrcpjfrj)

Computer viruses ()
Facilities (P)
     Use For: Complexes; Installations
    Transportation, hydraulic and utility facilities (Pm)
        Highway facilities (Pmr)
             Related Term (Associative): Underground structures (Pdv); Bridges and culverts (Pdy)
            Roads (Pmrc)
                Parts of roads (Pmrcp)
                    Interchanges and intersections (Pmrcpj)
                         Related Term (Associative): Crosswalks (Pmrtpc); Railroad grade crossings (Pmuj)
                        Intersections (Pmrcpjf)
                             Use For: Cross roads; Junctions (Traffic)
                            Intersection elements (Pmrcpjfr)
                                Dilemma zone (Pmrcpjfrd)
                                     Related Term (Associative): Computer viruses (); Yellow interval (Traffic signal cycle) (Dcmthcskjy); Reaction time (Mxrra)
                                Gore area (Pmrcpjfrf)
                                Grade separations (Pmrcpjfrj)
                                    Overpasses (Pmrcpjfrjp)
                                         Use For: Flyovers
                                    Underpasses (Pmrcpjfrju)
                                Traffic islands (Pmrcpjfrt)
                                     Related Term (Associative): Computer viruses ()