Ключевые слова: background, barricade, barrier, block, blocked, boundary, cement, city, concrete, construction, danger, dirty, fence, forbidden, gray, hard, highway, industrial, industry, norrland, object, objects, obsticle, outdoor, prevent, protection, red, reflector, road, roadblock, rough, safety, security, site, solid, stone, stop, street, strength, strong, structure, texture, traffic, umea, urban, wall, warning, white, work, yellow,