Right-of-way Depot

From OpenTTD

Railway junctions 3-Way junctions Basic 3-Way Line Merge Half Cloverleaf Half Spaghetti Compact 3-Way Compact 3-Way B-M Junction Ultimate 3-way 4-Way junctions Basic 4-Way Roundabout Cloverleaf Spaghetti Star Complex Star Branch-Merge Over-Under Tetrathorp Pre-Signaled Roundabout Advanced Roundabout Right-of-way Roundabout Enormous junctions Double Cloverleaf Dual Tetrathorp Dual Branch-Merge Quad Branch-Merge 8-Way Star Other junctions Right-of-way Depot Dual tunnels Right-of-way Lane Change Unuseful juctions Crossover 3/4ths junction Ultimate 3-way junction for 4 tracks

Trains exiting depots move much slower than trains traveling on the main lines. With pre-signals, you can make trains exiting the depot wait for trains on the main line to pass. It is a good idea to understand pre-signals if you want to understand HOW and WHY this works.

This layout creates a pre-signal chain running backwards along your track. In the picture, a train on the main line has made the gray exit pre-signal red. The red exit pre-signal communicates to the combo pre-signals, and turn them red. The entry pre-signal is red because its only exit pre-signal is red.