Hold short -markers for taxiways.
Currently aircraft AI blocks route from start to finish in totally nonsensical way and prioritizes traffic in random manner. To update this I’d love to see the following:
A hold short -marker for a taxiway would be placeable like the current one way markers. It could be only a dot, it could be a line, cosmetics is not really that important. However, that would allow plane AI to then book the route up to next hold short -marker if the path is clear, which would ensure traffic keeps moving in all parts of the airport.
Using a 2-way taxiway system one could then organize arriving and departing traffic efficiently and make it flow well as planes would always then be able to hold short before a junction on taxiways. I’d imagine this wouldn’t need massive amount of work on the code.