the road next to the runway would be the taxiing road lol, i think,
i get my ai planes to land using this trigger
Acitvation:West
On activation:
aiplane land "LAND"
where aiplane is the name of the plane you want landed
place this a fair amount away from the runway to give it time to lower altitude /speed and what not
and then ive noticed that sometimes, it drives on the taxi road partially by itself