Complexity of air traffic

The term "indicator of air traffic complexity" covers designs and very different realities, depending on the definition and the use we make of these indicators: control centers comparison, types of aviation sectors, rough estimate of the workload, relationship with physiological indicators of stress controller face to a given traffic, etc..

Considering the traffic as a vector field (positions and velocities of the aircraft) evolving over time, it is possible to introduce an intrinsic measure of the complexity of air traffic, regardless of their relationship with the controllers' workload. The traffic is then seen as a dynamic system, and complexity can be seen as a physical measure of the topological Kolmogorov entropy of the system.