zztong
Hunter
Not likely to happen, because vanilla relies on this (sorta kinda) for driveway parts, for example. Driveways were the inspiration for this because I realized, "hey, what happens if you make a really big driveway part? I mean REEEEALLY big?" Parts always override tiles, otherwise parts just wouldn't work correctly.
But the driveway Parts have a planned amount of content to overwrite, usually 1-3 blocks on the Tile on which a POI is placed. They don't extend beyond the Tile on which the POI is placed. The Checkpoint POIs have a larger Part similar to a driveway that also remains on the Tile that the POI is placed. The unusual behavior is extending a POI's Part beyond the bounds of the POI's Tile.
Admittedly, I say "unusual" because TFP hasn't done it, other than RoadExits. If it works, great. But if TFP does it then I think it is safer to assume the feature will stick around.
If it is possible the air port could be built in the lower left of the large picture.
@EvilPolygons has a better take on this than I do.
Do I correctly understand your goal as having a 10-tile long runway in the middle of a settlement?
The only somewhat predictable arrangement of Tiles I can think of that long is Rural Tiles when set to wrap a settlement, and even then you can't be certain that line will be perfectly straight, but you can be largely certain the roads will be mostly T's and Straights (but some intersections and corners) where the T's are oriented to face towards the settlement unless it decides a gateway is needed on that side of town. I suspect you're likely to get segments of your runway scattered all around the outside of your settlement.
Something I don't think anyone has tried ... since a very large Part can extend beyond a Tile ... is what if you made 10 Parts each extending further and further from the POI. I mean, can you stack 10 Parts end to end that way and what kind of chaos would that cause if you could?