Ключевые слова: abstract, background, block, blocked, buried, cars, chair, city, cold, concept, covered, crowd, dangerous, europe, fixed, flakes, footprint, footwear, frozen, ground, ice, impassable, isolated, keep him, madrid, nature, restriction, road, shapes, slick, slippery, snow, snowflake, storm, texture, top, trace, traveled, tree, weather, wet, white, winter,