People flow as refers to numerous people moving, around buildings, around cities or across borders.
Urbanization creates a need for managing traffic flow in cities. As of 2005 more than 50% of the world population lived in cities and the process of urbanization is expected to continue.
As the population in cities increases, and the subsequent environmental challenges need to be taken care of, cities are forced to grow tighter and upwards. Challenges arising from this trend are the congestion and crowding of cities. However, as history records show, successful urbanization is a prerequisite for economic growth.
Buildings used by many people need to be designed with people flow in mind. Extra oversight is needed for elderly people moving around buildings.
For professionals involved in planning and renovating buildings (architects, elevator and escalator companies, etc.) this creates a particular challenge. By understanding user needs and coming up with new ways of solving the challenges of people flow, these professionals can create solutions that enable people to move smoothly, safely, comfortably and without waiting from one place to another.
Public transportation transit centers, shopping malls, airport hubs, multipurpose complexes, even big office buildings and other high-rise buildings are all examples of areas where well-planned people flow impacts the experience of using the building.
In 2003, Alessandra Buonfino, Theo Veenkamp and Tom Bentley, produced a leaflet arguing that problems relating to migration would be eased if a 'flow management' approach was taken.