Rail

Rail should be planned as a route project with stations/signals/rolling stock, not a single material entry.

When it fits: Choose it when connecting resource sites or distant production is part of the base plan.

The tradeoff: One source recipe run makes 2 and lists 1 Stone, 1 Iron stick, 1 Steel plate at Assembling machine 1 / Assembling machine 2 / Assembling machine 3; 1 recipe variant(s) for this output are grouped together. Verify access where the pack is incomplete. The recipe cost scales with route length and omits locomotives, wagons and signaling objects.