BBHs
	View all BBHs
	3-way BBHs
	4-way BBHs
	Other BBHs
BBHs
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The backbone hubs are the main structure of the network. Constructing them is one of the hardest tasks on the map, as making properly balanced hub can be made in many different ways and requires some basic knowledge.

There always used to be two types of BBHs, and those are 4-ways and 3-ways. For some quick and simple examples, you can see the basic hubs. Other hubs are junctions of strange types, like half-junctions, more than 4-way junctions or junctions with some special purpose like controlling trains by logic.