OpenSidewalks
OpenSidewalks (OSW) is an initiative led by the Taskar Center for Accessible Technology (TCAT) at the University of Washington (UW).
OpenSidewalks seeks to provide a specification that is not only compatible with OpenStreetMap but is a comprehensive and accessibility-forward specification for mapping sidewalks and related pedestrian infrastructure features.
Additional details about this project can be found here on the TCAT website.
OpenSidewalks Schema
The OpenSidewalks Schema is a proposed open pedestrian transportation network data standard which draws from and is intended to be largely compatible with OpenStreetMap data.
OpenSidewalks Tasking Manager
The OpenSidewalks Tasking Manager is a Tasking Manager instance for coordinating contributions to OSM following OSW guidelines, and is open to all OSM users.