MODULE 4

Module II: Urban Planning Theories

Basic Concepts and Definitions

  • Orthodoxies of planning, sustainability, and rationality in planning.

  • Theories of urbanization include the following:

    • Concentric Zone Theory

    • Sector Theory

    • Multiple Nuclei Theory

  • Ebenezer Howard’s concepts:

    • Garden City Concept

    • Green Belt Concept

    • City as an Organism

  • Emerging concepts:

    • Global City

    • Inclusive City

    • Smart Cities

    • Livable Cities

    • Safe City

    • Futuristic City

    • Shadow Cities

    • Divided Cities

  • Models of planning.

Urban Design

  • Definition: Urban design is the process of designing the physical features of cities, towns, and villages.

  • Characteristics:

    • Deals with groups of buildings, streets, public spaces.

    • Aims to make urban areas functional, attractive, and sustainable.

    • Involves activities like sketching, planning, and organizing development.

View of Professional Boundaries

Parameters:

  1. Architecture:

    • Agent of the state in controlling land production, site allocation for social goods.

    • Focuses on architectural elements and ambient space.

  2. Urban Design:

    • An open system focused on social interaction and public communication.

  3. Urban Planning:

    • Involves the political economy of the state and urban growth dynamics.

Space and Time Concepts

Traditional Concepts:

  • Space-Time: Duration and Area/Extension.

Modern Approaches:

  • Mental Space: Experiential understanding of places.

  • Physical Space: Existential perception of built environments.

Aesthetics:

  • Involves the creative arrangement of elements for beauty and functionality.

Understanding the City Observer's Relationship

  • Importance of harmony between built environment and nature.

  • Vistas: Consideration of landscape views from the city.

  • Expression: Role of symbology and urban markers.

  • Entrance/Approach: Cities' impacts on visitors.

  • Colour and Light: These elements are integral to visual aesthetics.

  • Water: Proximity to water is a valuable asset for urban spaces.

  • Geometry: Impact of angles, lines, and curves on urban design.

  • Human Scale: Designs focus on inhabitant usage and feelings within the space.

Aspects of Urban Form

  • Imageability: Physical versus Functional images.

  • Form-Function Relationship: Dynamics of urban structure.

  • Variations of Urban Form and Structure: Includes Linear, Radial, Grid, and Cluster forms.

  • Objectives of Urban Form: Growth, meaning, and identity considerations.

Evolution of Urban Design

  • Historical context: Settlement design has always existed.

  • Changes in needs, consciousness, and professional discipline development.

Factors Affecting Land Use Policies

Targeting Spatial Policies:

  • Fiscal/inter-governmental transfers, tax policies, environmental regulations, etc.

Types of Land Use:

  • Natural, Man-made, Rural, Urban environments.

Major Milestones in Urban Design

  • Industrial Revolution: Shift from unconscious design to conscious design.

  • Distinction between pre-industrial intuitive design and post-industrial designer-focused approaches.

Urban Design in Pre-Industrial Era

  • Traditional urban structures based on cultural and religious principles.

  • Public realms dominated by face-to-face communication.

  • Cities evolved naturally in response to ecological and social choices.

Urban Design Features/Concepts Over Time

Timeline of Settlement Concepts:

  1. 6000 BC: Concepts of center, orientation, and walls.

  2. 3500 BC: Classical elements focused on clusters and privacy.

  3. 400 AD: Introduction of hierarchical building designs.

  4. 900 AD: Emergence of focused aesthetics.

  5. 1500 AD: Renaissance emphasis on geometric spaces and public places.

Urban Design Features of the Renaissance

  • Regular geometric spaces and important visual perspectives in city layouts.

  • Public squares with significant cultural features like sculptures and fountains.

Concentric Zone Theory

  • Developed by Ernest Burgess in 1925, explaining urban social structures based on concentric rings.

Zones Identified:

  1. Central Business District (CBD)

  2. Transition Zone

  3. Low-Class Residential (Inner Suburbs)

  4. Middle-Class Homes (Outer Suburbs)

  5. Commuter Zone

Sector Model

  • Proposed by Homer Hoyt in 1939, suggesting that cities develop in sectors rather than rings.

Model Components:

  1. CBD

  2. Transportation and Industry

  3. Low-Class Residential

  4. Middle-Class Residential

  5. High-Class Residential

Components of Hoyt Model

  • CBD: Core economic activities and high-rise structures.

  • Transportation Routes: Influence land use and distribute activities along corridors.

  • Residential Areas: Differentiation among income classes based on proximity to industries and CBD.

Multiple Nuclei Model

  • Developed by C.D. Harris and Edward L. Ullman in 1945, identifying that cities have multiple growth points or nuclei.

Key Features:

  • Growth beyond a single CBD as various activities scatter and form new nuclei.

  • Recognizes the need for a realistic urban structure accounting for societal changes and transportation developments.

Limitations of Urban Models

Concentric Zone Model:

  • Limited by its simplistic representation of urban environments.

Sector Model:

  • Monocentric focus neglecting multiple centers.

Multiple Nuclei Model:

  • Rigidity in zoning, neglecting environmental factors and smaller towns' dynamics.