2ndgengeek:

corpish:

I’m convinced it was an interdimensional portal

Oooh, I know this one! The FAA (Federal Aviation Administration - they make the rules for flying here in the US) has designated “roads” in the sky to keep all the commercial jets from running into each other. When you’re headed the same direction at the same speed, you don’t get in each other’s way. If you’re heading east you fly at one elevation, and west-bound planes fly at a different height. There are lots of rules to keep mid-air crashes to a minimum.

However, if you’re running late, or weather in one spot is bad, you can call up Air Traffic Control and ask for a new route! And they will look at their little radar screens and maps of all the airplanes in the area, and tell you what shortcut you can take.