devices
type: Concept
narrower: traffic lights
preferred label: apparater @sv
preferred label: laitteet @fi

traffic control
type: Concept
preferred label: trafikledning @sv
preferred label: liikenteenohjaus @fi
related: traffic lights

traffic safety
type: Concept
preferred label: trafiksäkerhet @sv
preferred label: liikenneturvallisuus @fi
related: traffic lights

traffic signs
type: Concept
preferred label: trafikmärken @sv
preferred label: liikennemerkit @fi
related: traffic lights

traffic lights
type: Concept
broader: devices
in scheme: conceptscheme
preferred label: trafikljus @sv
preferred label: liikennevalot @fi
related: traffic control
related: traffic signs
related: traffic safety