# Path Signal

> Canonical source: [Path Signal](https://satisfactorybase.com/wiki/buildings/path-signal)
> Language: en

Directs the movement of trains to avoid collisions and bottlenecks.

Path Signals are advanced signals that are especially useful for bi-directional Railways and complex intersections. They function similarly to Block Signals, but rather than occupying the entire Block, trains can reserve a specific path through it and will only enter the Block if their path allows them to fully pass through.

Caution: Signals are directional! Trains are unable to move against this direction, so be sure to set up Signals in both directions for bi-directional Railways.

## Properties

- Entity type: Building

## Construction cost

- [Steel Pipe](/wiki/items/steel-pipe): 2
- [Computer](/wiki/items/computer): 1

## Unlocked by

- [Railway Signalling](/wiki/schematics/railway-signalling): Milestone · Tier 6

## Technical Details

- Class name: Build_RailroadPathSignal_C
- Descriptor: Desc_RailroadPathSignal_C
- Native class: FGBuildableRailroadSignal
- Asset path: /Game/FactoryGame/Buildable/Factory/Train/Signal/Build_RailroadPathSignal