Sometimes, city growth and road construction takes place without a plan, because the demand for new living environments increases too quickly for local and national governments to act accordingly. When urban areas develop in an unplanned fashion, they will encounter a variety of problems: traffic will become slow and unsafe, and services will be found in locations that are not close to their users. 

In Finland, city growth and road construction are planned by zoning or land use planning. It affects our lives and living environments in a variety of ways. Every one of us can even take part in the planning of our living environments. 

A favela in Brazil. The favelas are slums that have developed on the outskirts of large cities as a result of unplanned construction. As a result, actual streets, water systems and green areas are lacking in these areas.