This theme involves core game concepts.
Complex and slow construction can be fun, but instant and free construction provides much more creative freedom. And that is the way of Factorio. It is a basic concept laid the foundation of the game and it cannot be changed, at least in vanilla.

... the most general case. Thanks! So, this idea need serious attention from developers. Good idea need good efforts to implement. Tunnel portals and bridge ramps are portals that turn off collision and in case of tunnels also invisible. The ghost train then travels in a straight line until it reaches ...

... with train not shown in the middle? So no internal space, just part of the tunnel out of view. That's exactly what OTTD does. Tunnel portals and bridge ramps are portals that turn off collision and in case of tunnels also invisible. The ghost train then travels in a straight line until it reaches ...

... this should be the main part of Factorio. ___ RL: If my supplier of logistic equipment were not able to deliver such a simple modification for his bridge of material flow, I would start looking for a new supplier. ;)

There is a mod, actually multiple, that add different kinds of aircrafts. Also, I like the bridge idea, and there are other threads that also expand on that idea. Here is an aircraft mod:
https://mods.factorio.com/mod/Aircraft

... Then I got hit by a train. Not once. But twice. Even still I sometimes come close to getting hit by an automated train. What if there could be a bridge to walk safely over rails? Or maybe a tunnel where the train could travel underground so as to allow a path over tracks? I'm beginning to use ...

I've been thinking about this for quite some time but I end up forgetting it but I'm finally writing it. Anyway, bridges. There are a lot of discussions for train tunnels and bridges, but we often come to some problems so this post is an effort to find an implementation that works. ...

... when a train is going 150+ km/h its difficult to see them coming when you're zoomed in, working on intrecate belt systems and whatnot. This is why bridges over railway lines will be handy. instead of risking your life trying to cross the line where it is unsafe, you put a bridge over the line instead. ...

So I was thinking (as one does) about ports for the game and I think personally that a brilliant console to port this to, to bridge the gap a nd lay the foundations for console release, is the Nintendo switch, given the incredibly vast indie games collection that is ever growing on the ...

... what happens when you place a long inserter right next to an assembler and it still picks up/drops the items fine even. That way when you want to bridge a two space gap (like that between tracks) with stack inserters you just use two stack inserters. The alternative would be creating a long stack ...

... layer. Maybe even several underground layers would be appropriate. Here are a few suggestion threads regarding underground rail tunnels/bridges (but not specific to underground layers): https://forums.factorio.com/viewtopic.php?f=6&t=46978 Underground Rail https://forums.factorio.com/viewtopic.php?f=6&t=44338 ...

Hello, TL;DR: Height differencies could make it possible to Build Bridge-Belts OVER Factories, Helicopters, WaterStorage-Pumping-EnergyStorage and Water-Energy-Plant. The Height Differencies would make the enironment more interesting and not as boring as ...

... "Green power" stuff but wait THERE'S MORE! Like in real life oil could be burned to create some sort of power. And together with rivers bridges might be added aswell, a bridge with rails would be a nice addition to the game (Visually). And now the last thing, please add some way of making ...

It would make a lot more sense to have a bridge than a tunnel, but like stated I don't see it being implemented.

The mid point of belts-rails-bots isn't quantity but flexibility. Some modders are developing "programmable belt routing" systems which I haven't got to grips with yet, but some kind of "ground based, fuel-using robots," that perhaps pathed down asphalt roads or one tile wide nar...

A small train is fine too.

Vehicles automatically slide along belts, have large inventories, and inserters can interact with them. Take advantage of this to move vast quantities of material, one car at a time.

What would that add over just having a long belt?

Currently i feel that the resource transportation capacity between the simple belt and train is to big and there is a need for a shorter range bulk transportation method. I would suggest a "tram" system that would use a "railway" that can be placed like the belt and trams that ar...

What's the benefit of this other than roleplaying?
Fluids are much more awkward to handle than items and don't even get me started on barreling.
Also the "gap" you "bridge" between solid fuel and coal is a 20% bump on the floor.
This is a pure gimmick.