Do you plan on allowing runways to intersect one another? E.g. R36/R18, and R27/R09?
Furthermore, do you plan to incorporate active runways, as in the airplane’s take off into the wind depending on its direction at the time? (Weather related) Additionally, airports that have predominate winds coming from one direction, one only require one runway for maximum takeoff efficiency, whereas other places with predominate winds coming from multiple directions would require multiple runways heading into different compass directions. Would this be a part of the game? Due to the scope of the 2D nature of the game, it seems as if only N/S/E/W runways could exist, is this correct? A wind rose could be development procedurally for each airport location to provide a challenge here is an example: Wind Rose. With this example, you would want an east/west oriented runway, with most flights taking off into the west.
Will the runways be labeled corresponding to their compass orientation? E.g. Runway 36 and 18, would run from South to North, with the southern point labeled as 36, and the northern part 18.