Identify crossroad nodes in openstreetmap data (.pbf)

does anybody know if there is a way I can seperate only the crossroad nodes which are included in a .pbf file? Is this clue (if a node is crossroad or not) included in this file's format?

Another option to solve your issue would be to use the new Atlas project.

As part of loading .osm.pbf files into in-memory Atlas files, it takes care of doing way sectioning on roads:

• Load your pbf file into an Atlas. You will then have an Atlas object that you could save to a file and re-use.
• Use the Atlas APIs to access all the intersections

In the end, each Atlas Node which is connected to more than 4 Edges on a two-way road or 2 Edges on a one way road would be a candidate if I understand your question correctly.