Source : https://www.youtube.com/watch?v=gmvLU_ePUA8

Transition.city is a transit network edition and analysis platform, fully open and requiring only already available open data (OpenStreetMap) to run. It uses trRouting, a custom designed path routing engine specifically tailored for transit network, and OSRM (Open Source Routing Machine) It allows you to create transit network from scratch or edit an actual one using GTFS and do various analysis on them. We will present what the tool does with some transit planning science, how it leverage OSM and what you need on the map and show actual examples