How does urban design shape the open spaces of cities?

In the context of garden and landscape design, urban design shapes city open spaces by establishing a structural framework that defines the character of the urban environment. Cities are composed of three primary elements: buildings, circulation-utility corridors (streets, railways, and transit), and open spaces.1

Urban design influences these spaces in several key ways:

• Defining the Open-Space System: Modern urban planning increasingly views the total open-space system—comprising parks, plazas, and corridors—as the city's major qualitative structure. Rather than treating corridors merely as utilitarian passages for vehicles, some planners advocate for designing them as social spaces for people.1
• Integration of Greenery: Designers incorporate green spaces, such as parks and playgrounds, to provide visual relief, recreational opportunities, and ecological benefits like pollution processing and climate moderation. The distribution of these spaces varies significantly based on historical development and urban density.23
• Balancing Public and Private Needs: As population density increases, the focus shifts from private gardens to public open spaces. Urban design seeks an optimum relationship between these elements, particularly in high-density developments like townhouses and condominiums, to meet community needs for interaction, relaxation, and withdrawal.41
• Structuring Urban Form: Historically, urban design has utilized grand boulevards, symmetrical squares, and civic centers to organize city life, often reflecting the cultural and political priorities of the era.2