To increase the productivity of public transit networks, we need a comprehensive way to study it from various perspectives, particularly in conjunction with the built environment of cities. Traditionally, the approach toward public transport interventions is to study ridership data without unpacking the underlying urban form and context of the transit network. We present the concept of didactic cartography-an approach to teach complex systems through clear and engaging spatial data-in relation to public transit and their built environments. We propose a transdisciplinary and interactive platform - CAMMM Atlas web application - that aggregates data and disseminates information in an accessible manner. The Atlas points to areas of opportunity to increase the productivity of the transit system and improve spatial equity in the urban space. Through this tool, understanding the gaps in public transit systems will enable local transit authorities, decision makers, and other stakeholders to collaborate on spatial equity issues like multimodality, connectivity, safety, accessibility, proximity to services and amenities, etc. The multidisciplinary approach of the Atlas allows policy makers and transportation professionals to obtain concrete recommendations to improve the productivity of public transit.
