Open-source airline route maps from 1999 and 2018 created using Python and BTS data (see corresponding comment for clarifications + GitHub link) [OC] : r/dataisbeautiful
iCATA: Building a realtime bus locator app
Data model for operational OS/OW routing database | Download Scientific Diagram
Routing in a Network Data Model | The Geography of Transport Systems
ms access - Local bus schedule structure/design - Database Administrators Stack Exchange
A Transport Hub Database Model | Vertabelo Database Modeler