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:

• Backbone Hub
• Sideline Hub
• Ghetto Style Hubs
• Crazy Hubs

Different sizes are, of course appropriate in different situations. Ghetto Hubs would be the crossroads, Sideline Hubs would be regular intersections, and Backbone Hubs full scale interchanges.