Canadian Air Transport Security Authority. May 2006.

Exponential growth in air traffic, passenger and baggage volumes and the  ensuing increase in airport congestion will pose an inevitable obligation for wholesale transformation in air transport systems throughout Canada and the world. This will entail everything from major airport expansions and better air traffic management to use of smaller “satellite” airports and heightened passenger throughput in every airport, large and small; from expanded management systems and communications networks that enable more decentralized decision-making to the dissolution of traditional “hub and spoke”
air systems in favour of tailor-made, on-demand, more flexible “free routing” and “free flight operations.”