Ключевые слова: city, conditions, cover, covered, footwalk, footway, freeze, intense, neighborhood, operation, schweiz, seasonal, service, severe, sidewalk, snow, snowcovered, snowfall, snowplough, snowplow, snowy, stop, street, suisse, switzerland, town, track, tram, transportation, urban, walk, weather, winter, wintertime, wintery, wintry, work, zurich, zypressenstrasse,