The concept and characteristics of urbanisation

Urbanisation refers to the increasing proportion of a country's population living in urban settlements, such as towns and cities, leading to their growth in size and number. This process marks a shift from rural to urban living.

Distinguishing features of urban settlements

• Economic activities - Unlike rural areas focused on agriculture, urban economies are based on manufacturing and services.
• Population size - Urban areas are significantly larger in both population and physical extent compared to rural hamlets and villages.
• Density - There is a higher concentration of people and buildings in urban settings.
• Lifestyle - Urban life often involves a different way of life compared to rural settings.

Global patterns and trends in urbanisation

Urbanisation levels vary significantly across the world, influenced by economic development and regional characteristics. While the global population continues to grow, the urban population is expanding at an even faster rate.

Distribution of urbanisation worldwide

• High urbanisation regions - Developed and emerging countries, such as those in North America, Western Europe, and parts of South America, show the highest percentages of urban populations, often exceeding 75%.
• Lower urbanisation regions - Areas in Africa and South-East Asia exhibit the lowest levels, with many countries having less than 45% of their population in urban areas.
• Global growth trends - Between 1950 and 2015, the world's urban population more than trebled, while the total population more than doubled. Currently, about half of the global population resides in urban areas.

Urbanisation rates by development status

Developing countries:

• Experience rapid urban growth due to concentrated economic development in cities.
• Significant rural-to-urban migration driven by push-pull factors.
• High natural population increases within urban areas.

Developed countries:

• Urbanisation rates are slower as a large majority already live in urban areas.
• However, the built-up areas continue to grow.
• The urban lifestyle increasingly influences surrounding rural areas through a process known as rural dilution.

The urbanisation pathway and stages of development

The urbanisation pathway illustrates how the proportion of a country's population living in urban areas changes over time as it develops economically. This progression is often represented as an S-shaped curve, reflecting distinct stages of growth.

Stages of the urbanisation pathway

• Stage 1: Early urbanisation (Developing) - Countries start with a very low percentage of urban population.
• Stage 2: Accelerating urbanisation (Emerging) - Rapid economic growth leads to a sharp increase in urban population as industrialisation and migration intensify.
• Stage 3: Mature urbanisation (Developed) - The rate of urbanisation slows as a significant portion of the population (often around two-thirds) already lives in urban areas, and economic growth stabilises.
• Stage 4: Counter-urbanisation (Developed) - Urban growth flattens or declines as people and businesses move out to smaller towns or rural areas.

Key processes driving urban growth and change

Urbanisation involves several processes that transform rural areas into urban ones and influence the structure and expansion of existing urban settlements. These processes occur in a sequence as urban areas evolve over time.

Core processes of urban development

Agglomeration:

• The initial concentration of people and economic activities at advantageous locations, such as river crossings or near resources.
• Often chosen for defence or trade benefits in early times.

Suburbanisation:

• The outward expansion of towns into surrounding areas, creating lower-density suburbs with housing, employment, and services.
• Driven by improved transport links allowing easy access to town centres.
• Also driven by overcrowding, congestion, and rising land prices in central areas.
• A general decline in the quality of the residential environment near the centre.
• The arrival of more people (mainly from rural areas) and new businesses.

Formation of conurbations:

• The merging of nearby towns and cities into a single, extensive built-up area due to continued growth and suburbanisation.

Commuting and dormitory settlements:

• As urban areas expand, some residents move to smaller, often mainly rural settlements for living while maintaining work and service connections to the city.
• This creates dormitory settlements primarily used for residence.

Counter-urbanisation:

• A later stage where people and businesses relocate further out to smaller towns or rural areas.

Emerging trends in urban development in developed countries

In developed countries, where urbanisation levels are already high, new processes are reshaping urban landscapes. These trends focus on redefining existing urban spaces and adapting to changing population dynamics.

Modern urban processes

Urban regeneration:

• The revitalisation of neglected or abandoned areas within cities, often older industrial or central zones, transforming them into modern residential or commercial spaces.
• This process also involves urban re-imaging or re-branding, enhancing the perception of entire cities or specific districts.
• Examples include the transformation of former docklands into upscale areas in major European cities.

Urbanisation of suburbs:

• Increasing the density and functionality of suburban areas by developing vacant plots, replacing large houses with flats, and introducing shops and services.
• This shift aims to utilise suburban space more efficiently as rural areas diminish, raising suburban densities to an urban level.