Lack of data on popular transport enables official invisibility of (these) mobility systems in planning (…) Rallying against this, a ‘digital commons’ movement has emerged in support of better transport planning globally. This movement leverages the digital revolution to build high-quality, open and standardised public transport data for planning, information services and as the basis for moving towards a new mobility paradigm. Within this paradigm, the ability to access a wide suite of high-quality mobility options via a mobile phone becomes a more compelling ideal of freedom than simply owning or using a car. This transition to freedom of movement by not owning a car but accessing and paying for a choice of multiple transport modes via mobile-phone technology is a key step towards more equitable, clean, safe and low-emissions cities (…) with this vision, civic activists (hackivists) are using basic GPS-enabled mobile phones and other technologies to build high-quality, standardised data for public transport including dominant popular transit modes. This data is made open and shared widely to improve understanding and discussions of how to improve transport planning and build passenger information systems, the stepping stones to a new mobility paradigm (…) The Digital Matatus map and data allow us to see a critical part of Nairobi’s circulatory system (…) Evidence is growing that this kind of trip-planning information can help people make more efficient trips and, when coupled with real-time information, reduce waiting. This, in turn, improves the way passengers interact with and feel about public transport.