Ключевые слова: abstract, art, beacon, black, bokeh, bright, caution, caution light, city, cloud, concept, conceptual, control, copy space, crossroad, danger, day, defocused, design, equipment, glow, intersection, lamp, light, metal, metaphor, no one, nobody, norrland, plate, safety, semaphore, sign, signal, sky, stop, stoplight, street, symbol, texture, traffic, traffic light, traffic signal, transport, transportation, umea, umedalen, up, warning, yellow,