Ключевые слова: 30 kmh, arrow, asphalt, bicyclists, car, city, crash, direction, empty, europa, gas emission, injuries, jurisdiction, lane, line, marking, maximum speed limit, motorists, noise pollution, parking, pedestrians, public space, reduce road crash, residential area, road, road marking, safe, safe street crossings, school zones, sign, speed limit, speed limit sign, street, switzerland, symbol, track, traffic, traffic calming, transport, transportation, travel, urban, urban roads, way, white, white letters, white road sign, zone 30,