  The concept of hierarchy in complex systems is tightly linked to
co-evolutionary processes. We propose here to explore it in the case of the
co-evolution between transportation networks and territories. More precisely,
we extend a co-evolution model for systems of cities and infrastructure
networks, and systematically study its behavior following specific hierarchy
indicators we introduce. We show that population hierarchy and network
hierarchy are tightly linked, but that a broad range of regimes can exist.
Model exploration furthermore yields non-trivial stylized facts which can be
taken into account for territorial planning on such long time scales with
co-evolutionary processes.
