Ключевые слова: alert, attention, barrier, car, caution, city, cobblestone, enforcement, environment, information, infrastructure, instruction, law, limit, metropolitan, municipal, no, notice, ordinance, outdoor, parking, passersby, pavement, pedestrian, prohibition, public, regulation, restriction, road, rule, safety, sidewalk, sign, street, symbol, traffic, transportation, travel, urban, urbanization, vehicle, warning, yellow,