Runways and Taxiways
Very basic mod that adds non functional draggable runways and taxiways to the airport menu (currently have gravel path icons, the tooltip will show which one is which).
Works before and after the patch (may be functional after the patch, this is untested).
Currently you can only connect the taxiway to the 3 points next to the airport terminal. However if you have Road Anarchy mod, you can enable that mode and connect the taxiway to the points where the taxiway connects to the existing runway of the airport.
Source code: