Ключевые слова: background, block, blockage, blocked, border, bouncebock, boundary, boundery, buffer, bumper, concept, dead, end, finished, industry, limit, limitation, line, outdoor, prohibited, rail, railroad, railway, ram, red, restricted, restriction, rocks, rusted, rusty, safety, scandinavia, siding, sign, signal, sleeper, steel, stones, stop, stopper, strong, sweden, track, tracks, traffic, train, transport, withered, wooden, yellow,