http://i.imgur.com/dnM5To1.jpg
Mods used:
Bottleneck
cheaper landfill

Creative Mode

Logistic train network
Long reach
Waterwell (pump free water from the ground)
Waterfill

Console commands used:
/c game.player.teleport({0, 900000})

This game is half an hour in, and the console command was used ...

It would be way too OP, as it would either subvert or trivialize intersections. You have signals for a reason, and the devs want you to use them, not subvert them.

No. They are intended to be used in conjunction with productivity modules. In the context of a "normal" playthorugh (launch one rocket and you're done), beacons are unnecessary. However, with an RPM base, beacons plus productivity modules are a must. Without productivity, you need 101000 iron ore ...

Water and steam are the same fluid.