Urban Structure, Functions, and Hierarchy

Urban Structure and Morphology

Urban structure refers to the division of a city into areas with different morphology and functions. Most cities contain the following zones:

• Downtown: The interior area where the main commercial and business activities are concentrated. In Europe, this is typically located in the historic city center. Key features include high accessibility, a concentration of vehicles and people, and a low resident population.
• Historic Residential Areas: These form a belt, mainly residential, which surrounds the core.
• Periphery or Suburbs: Areas consisting of urban houses built more recently.

Primary Urban Functions

Urban functions are the activities performed by cities. While some cities specialize in one function, most are multi-functional:

• Political-Military Functions: These include government, land administration, and defense. Cities house various government agencies.
• Business Functions: Many cities serve primarily as centers for manufacturing and services.
• Cultural Functions: These encompass various institutions such as universities, religious centers, and leisure facilities.

Urban Hierarchy and Networks

Cities form urban networks in space, organized into a hierarchical structure sorted by relevance. This hierarchy depends on the functions they perform:

• International Great Metropolises: These focus on advanced features and serve as major centers for political and economic decision-making, maintaining close relationships with one another.
• National Metropolises: These lead the urban network within a country. They concentrate the most advanced national services and act as a link between national and global urban networks.
• Regional Metropolises: These lead the urban network in their specific region, performing less specialized roles and acting as a liaison between national and regional networks.
• Medium and Small Cities: Their area of influence is local, and they maintain relations primarily with regional cities.

Challenges and Problems of Modern Cities

Rapid urban growth has resulted in urban anarchy, rising house prices, and a shortage of equipment. To solve these issues, each city develops its General Urban Plan.

Social and Environmental Issues

• Social Problems: Common in large cities, these include crime and social exclusion. Integration problems may also arise in areas heavily affected by immigration. Solutions to these problems include prevention campaigns and plans to promote integration.
• Environmental Problems: Many cities face issues such as air pollution, noise, and sewage purification. To solve these, municipalities determine specific measures to combat and prevent them.