Stairways (SWs) have the same characteristics as the Pedestrian Boardwalk (PB), but show different in WME. In the app, it shows similar to PB. The reason to use them at this moment is for editors to quickly distinguish them. Like PBs, stairways don't need connection to a drivable road and you do not need to make a junction node. If you connect, use an existing node or a Phantom node.