Singapore Calling: Social and Physical Segregation in Singapore

“Singapore Calling” is a pioneering project that utilized mobile phone call data to explore social and physical segregation in Singapore. By analyzing Call Detail Records (CDRs)—which log information about calls made, including timestamps, durations, and user locations—researchers mapped interactions between individuals from different socio-economic areas. This approach enabled a detailed understanding of social flows within the city, surpassing the insights typically gained through traditional methods such as censuses or surveys.

The study also identified areas of the city where interactions among diverse socio-economic groups occur more frequently. These “connection nodes” are often located in public spaces, shopping centers, or public transit hubs—places where individuals meet regardless of their background. Such spaces can act as catalysts for social integration and offer valuable insights for designing urban environments that foster inclusivity.

Singapore Calling exemplifies how big data analytics can yield novel insights into urban social dynamics. By leveraging real-world data and innovative methodologies, the project has deepened our understanding of urban segregation and provided practical tools for urban planners and policymakers.