Ключевые слова: bicycle, bike, blue, both, both ways, city planning, city street, climate change, direction, einbahnstrasse, emission reduction, environmentally friendly, eu, europe, european, except, german, germany, mobility, mobility solutions, one, one direction, one way, one way sign, outdoor, plate, regulatory, road, road sign, route, safety, sign, signal, smart city, street, street sign, symbol, traffic, traffic sign, transit, transport, transportation, travel, urban, urban planning, warning sign, way, ways,