A Hub, is the OpenTTD term for an intersection of multiple railroad tracks that go in different directions. It is very comparable to real life intersections on roads, from a crossroads to an interstate interchange.

Various types in #OpenTTDCoop include:

• Back Bone Hubs
• Side Line Hubs
• Ghetto Style Hubs

Different sizes are, of course appropriate in different situations. Ghetto Hubs would be the crossroads, Side Line Hubs would be regular intersections, and Back Bone Hubs full scale interchanges.