Ключевые слова: abstract, ask, asphalt, background, black, blacktop, cement, concept, concrete, confusion, copy, copyspace, doubt, floor, frequently, grainy, ground, help, idea, inform, interrogation, mark, marker, paint, pattern, pavement, pictogram, problem, punctuation, query, question, quiz, road, roadsign, search, sign, signal, space, street, support, surface, symbol, texture, think, traffic, transport, uncertainty, urban, white, worry,