UPDATED: * Added migration to native factorio train limits.

Restrict amount of trains trying to reach station simultaneously by circuit network.

How to use:
- Connect train station to circuit network
- Set station behavior to Enable on condition "locomotive" > 0
- Pass desired trains amount in "locomotive" signal to station

On red wire station will output negated amount of trains heading here

Details:
https://github.com/Patapum/ConcurrentTrainRestriction/blob/master/readme.md