Trains in Satisfactory: Signaling, Pathfinding, and Throughput Tips
Struggling with trains in Satisfactory? Here is how shortest-path routing really works, how to place signals, and how to design one-way loops and passing sidings so your network keeps flowing.
- Understand shortest-path routing and why trains ignore your “detours.”
- Place block/path signals to prevent collisions, not to reroute traffic.
- Use one-way loops, passing sidings, and station bypasses to keep stations clear.
Trains in Satisfactory routing basics
- Each train calculates a single shortest path at departure and sticks to it until the trip ends.
- Pathfinding does not consider congestion; it only considers path length and allowed directions.
- Trains will wait on the shortest route even if a longer bypass exists—build so the shortest path is also the correct one.
Signals: what they do (and don’t)
- Block signals divide track into blocks and allow one train per block.
- Path signals reserve a path through an intersection so other trains can still enter non-conflicting routes.
- Signals do not choose routes; they only decide when a train may enter the next block.
- Place signals before junctions and immediately after to create short, safe blocks through crossings.
Design patterns to avoid jams
- One-way dual tracks: Use a clockwise/anticlockwise loop (or paired lines) so “shortest path” always follows your intended direction.
- Passing sidings: Add a short parallel track with entry/exit signals so one train can wait while another passes.
- Station bypass lanes: Split before the station: main line continues past, branch into the platform. This keeps through traffic moving.
- Spacing: Keep blocks reasonably short on busy mains so trains clear junctions faster.
Station setup tips
- Name stations consistently; avoid duplicate names that can confuse your own routing plans.
- Use separate entry/exit tracks for big hubs; funnel into a stacker (multiple waiting tracks) before the platforms.
- Place a path signal at the start of each platform and a block signal after the merge back to the main line.
Quick troubleshooting checklist
- Train stuck at red? Check for missing exit signals or blocked blocks past the junction.
- Taking the “wrong” way? You likely left a slightly shorter path open—close it or make your intended route shorter.
- Deadlocks at crossings? Shorten block lengths around intersections and favor flyovers or roundabouts on busy lines.
FAQ
Can I force a route with signals? Not directly—signals only gate entry. Make the desired path the shortest by adjusting track length and one-way directions.
Do I need signals on single-train lines? No, but add them before/after stations if you will expand later.
Where can I learn more? See the Satisfactory wiki for mechanics and signal examples.
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