In a meeting with aviation experts, the terms black routing and red routing were discussed. What are they? From the discussions I was able to put together that either the TMU (Traffic Management Unit) or the controller can see two routes for a flight, a cleared route (black route?) and an agreed route (red route?).

I don't know what display they were referring to and if it was the controller that was looking at the display or if it was some traffic management display.

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    $\begingroup$ With no other information, I would think that one is the planned (ideal?) route and the other is the actual route, but I have no idea which one would be which. $\endgroup$ – mkennedy May 25 '18 at 22:00
  • $\begingroup$ It would be useful if you could add a geographical tag to this question, bear in mind this is a global website. The terms may very well be specific to a certain region. $\endgroup$ – expeditedescent Sep 2 '20 at 15:34
  • $\begingroup$ Why didn't you ask in the meeting?! $\endgroup$ – Michael Hall Oct 2 '20 at 17:42

Partial answer. In the traffic control community, red and green have the same connocation as automobile traffic lights. For example,

Red denotes a route blocked at the indicated departure time, yellow denotes a partial blockage, and green indicates that the route is not blocked.

-- Fig. 3, "Air traffic management decision support during convective weather," Weber et al, Lincoln Lab. J. 16(2):263-275.

So it's plausible that red routing means a route that needs attention.

The only mention in the literature that I found for black routing referred to something quite different: improving security for routing network packets, in "A case study in safety, security, and availability of wireless-enabled aircraft communication networks," Dureja et al, https://doi.org/10.2514/6.2017-3112. This term may be informal jargon that one would have to ask the actual meeting participants about.


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