You can also use Prop Painter addon for Move it mod, however it does have click-through issues so it may not be as useful.

@Kirbs They should randomly cycle through the 3 main colors (white, red, and yellow). Try placing it again until you get the color that you want.

when i plop these into my city, they are red. anyone know why?

Ok, thanks a lot @vasimr22

@pardo_vini The typical method is to make a loop with the taxiway, so that there is always one going in and one going out (I recall seing the plane AI back-up before on a taxiway, but I wouldn't rely on that behavior).
As for the runway crossing / connections... you are better off connecting them where you want the planes to enter / exit, and leaving the rest as dummy connections (it can end over the runway, just not be snapped to it - use the move-it mod on the node). The plane AI tends to pick the shortest possible path, so that could mean turning onto / off of the runway at weird places (I have had planes still going through the landing animation as they pulled into the planestand).

By the way, it's my first time making a custom airport. I want two Runways and several gates, let me ask you:
-the plane stands need to be connected to the taxiway, but they are one way, so I'm making a Y (taxiway in, stand, taxiway out) 'cause I don't konw if the plane will go back if not in this mathod.
-any problem have an intersection with taxiways? or taxiways crossin runways? The planes will cross it?
-the plane what arrived in runway A, only will take off by the same runway A, right?
-can I connect more than one runway to a terminal gate?

@vasimr22 Thanks for the fast response. Man, I've been playing all night long modeling my airport using your assets, and still it's not the way I want...

@prado_vini These are props, as stated in the description, and on the asset tag. Props are unable to function in any way (only buildings can function). So if you are asking if they are functional from an aestetic perspective, yes, that is their purpose. But if you want to know if planes will stop at them, you need plane stand buildings which will interact with the plane AI.

Are they functional? The planes will stop on it?

@Overlord Ah, I don't think it matches any of mine, however, as I recall, it's a bit oddly shapped / sized. You are better off using mine, which are actually based on plane stands at real airports, and have been tested against proxy models of the aircraft listed above. The only exception would be that the one in the pack below may work better for A380s.

Yes of course I read it. I know that your pack has more versions of plane stands and more colors. I meant my comment in a different way - If there is any difference between stands in your pack and the asset I shared below. Like if the asset below is something extra, something different which is not in your pack or the asset below is the same as your largest plane stand = so it means that I dont have to use it and I can use your pack only.

@Overlord Did you read the description? This pack has 7 plane stand markings of different sizes, while the one you linked only has one. Also, these are completely different shapes, and can be placed in multiple colors (as shown above).

Most parking spots at large airports will have these markings, even if they are not adjacent to the terminal building. Occasionally there will be spots that are only stop bars, or have no markings at all, however, those are often temporary parking locations.

Is there any difference between your airport plane stand and this one?
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=759948278

I looked at Amsterdam Schiphol airport from google maps and I see the largest ones at terminals E and F (for the heavies) others are covered with real life props :D and badly visible.
Is this used even on parking spots not at the gates?

Awesome! Thank you