In urban planning, what does the term "woonerf" specifically refer to?

The term "woonerf" specifically refers to a calm traffic residential street designed with a shared space concept. This design prioritizes pedestrians and cyclists by reducing the dominance of motor vehicles, creating a safer and more communal atmosphere in residential areas. In a woonerf, the street space is often integrated with adjacent properties, allowing for a more holistic approach to how streets are used. Features such as street trees, benches, and flexible boundaries between public and private spaces encourage residents and visitors to interact, enhancing neighborhood livability.

This concept embodies the idea of shared spaces where the usual hierarchy of road use is redefined, leading to a harmonious coexistence of various forms of transport and community activities. This is why the correct answer emphasizes the woonerf as a shared space, making it distinct from other terms that focus on highways, zoning strategies, or regulatory frameworks which do not encapsulate the residential, community-oriented aspect of the woonerf.