There is a new version of this system available. The new version uses the same concepts, but is much more compact and versatile.
Features:
- Never change your train schedules, every new station is automatically and immediately supplied by the system
- Equal distribution of resources among all train stations
- Low number of trains due to constant utilization
- No global circuit wires along the train tracks
Explanation: https://www.reddit.com/r/factorio/comments/didisl/ets_easytrainsystem_a_vanilla_train_system/
Changelog: V4.4 - Fixed a bug where the station would disable before a new train actually entered the stacker, leading to very weird train pathing issues. V4.5 - Made the entry signal work like a chain signal for the small stations. This should prevent trains from entering the stations before the last train had a chance to leave.