Final answer:
Sidewalks, plazas, and promenades where vehicles are prohibited are known as Pedestrian zones. These zones support foot traffic and city liveliness, with Curitiba's pedestrian street being a prime example.
Step-by-step explanation:
Sidewalks, plazas, promenades, and other spaces where pedestrians are the primary users and motor vehicles are not allowed are examples of Pedestrian zones. These areas are designed to facilitate foot traffic and can contribute to a city's social and economic vitality, as well as its environmental friendliness. A well-known example is the transformation of one of Curitiba's main downtown avenues into a pedestrian-only street, which became highly successful and actively visited.