The document proposes The Transit Hub, a collaborative user interface for public transit. It would use digital surfaces like phones, tablets, computers, and displays to provide real-time transit information. This includes schedules, arrival times, routes, trip planning, and ticketing. The system would be open source, allowing civic entrepreneurs and users to develop applications and share data. It aims to make transit information more accessible, usable, and integrated across different modes of transportation like buses, trains, bikes, and cars.