  Systems of cities at the macroscopic scale have their trajectories
conditioned by the evolution of infrastructure networks. This leads to complex
planning and management situations in the particular case of international
transportation infrastructure projects. To understand such dynamics and
anticipate future sustainable trajectories, we introduce a co-evolution model
between cities and transportation networks at the international scale, which
simulates network growth by including transportation governance. The model is
applied to synthetic systems of cities and the parameter space systematically
explored, showing strong interactions between urban dynamics and governance
structure. We also study optimisation patterns as compromises between
construction cost and accessibility gain, with possible future applications to
sustainable long-term planning of international transport projects.
