TCRP G-16 Development of Transactional Data Specifications for Demand-Responsive Transportation (In progress)

GMNS

General Modeling Network Specification

OSM Relatify

OSM Relatify is a tool that simplifies the process of maintaining public transport relations

OpenStop

OpenStop is a free app to add information about barriers and other accessibility properties of public transport stops to OpenStreetMap

APTA Policy Development and Research - Public Transportation Embracing Open Data

APTA's discussion of the benefits and challenges of open transit data (a short summary of the below TCRP report)