[toomuchtodo]

> They actually have a few well defined corridors and altitudes in which they can operate - the straight lines drawn from one VOR (effectively equivalent to a major airport) to another at 1,000 foot intervals.

Until NextGen (ADS, etc) finishes its rollout and everyone flies direct instead of on Victor airways and VOR to VOR.

[falcolas]

True, but even then there will still result in "air highways" from airport to airport.

[toomuchtodo]

I would agree with this. Still, the number of "air highways" would increase drastically.