Factorio Forums

TL;DR
A ghost train should turn a signal red just like a real train

What?
Existing, real trains cannot enter blocks which have ghost trains in them.

Why?
Currently, placing ghost trains on tracks which are in use is pretty dodgy. Because the ghost train doesn't block the signal, you can get a lot of weird interactions. For example, the robots can place half of the new train right after the real train decided to enter that block at full speed, annihilating it. Then the other robots place the other half the train after the real train leaves.

Yeap. That is exactly the reason I have dedicated train-building areas. That have no way for trains to get into them.

But you could, like, start the ghost train on an exit-only siding instead of right in the middle of things.

+1

Kyralessa wrote: Thu Nov 21, 2024 3:41 pm But you could, like, start the ghost train on an exit-only siding instead of right in the middle of things.

This means you can't place a station, and a train that will service that station, in the same blueprint.

Hmm, what should happen if you put a ghost train on a block that's already occupied by a real train? (Once the real train leaves, the ghost train reserves the block, and only then will construction robots make the train.)

What about several ghost trains on the same block? (Have the bots construct a train arbitrarily, then wait for it to leave the block before making the other one)

DeadMG wrote: Sat Nov 23, 2024 10:46 am

Kyralessa wrote: Thu Nov 21, 2024 3:41 pm But you could, like, start the ghost train on an exit-only siding instead of right in the middle of things.

This means you can't place a station, and a train that will service that station, in the same blueprint.

What I would do is deconstruct a piece of track so live trains can't get in the way, put the ghosts down, once they've been built, put the piece of track back.

That is what I've been doing, but it breaks how construction robots should work- place and forget