Tram Linegraph from Freiburg with OSM-data of January 2019. New tram ways are not holding the construction tag anymore.
Subway Linegraph of Munich with OSM-data of January 2019. Some nodes are found, but not connected through ways. One reason for this is, that the nodes are (wrongly) classified as subway nodes while they truly belong to a tram system.
Subway Linegraph of Chicago with OSM-data of January 2019. The quality of this result is low (stations are not connected and are at the wrong position). This shows that the usage of more advanced methods to include the stations in ways and find the ways between them, would benefit the result quality.