Travel and trade are closely intertwined:
Trade in the Sea of Stars
While the tradition is that dragons pillage and steal, after their victory over the gods, they found that they owned everything, neatly divided by their contribution to the victory. Dragons found themselves as rulers and overlords with access to immense amounts of wealth but some still sought more.
The Empress quickly clamped down on conflict between dragons except through formalized and ritualized channels. For unlike many of her kin, the Empress saw that conquest and plunder destroyed value in both the short and long run; While wealth was increased and enhanced by trade. Creation, commerce and mercantile activity was to be the beating economic heart of the Imperium.
To support and encourage trade, the Empress instituted several systems:
Sea of Stars RPG Design Journal 