Idle Train Notification

There should be a setting to alert you if trains are sitting idle for an extended period of time. As production shifts with different projects I find that sometimes the movement of goods shifts that stations which were running lots of trains through on a regular basis slow down to only a trickle and the trains get backed up which bottlenecks other train lines that need to share the track. I have to frequently scan the map for these bottlenecks to adjust the flow. We need a notification that trains are sitting idle specifically when NOT in a station to alert us that there could be a bottleneck clog occurring.

The player must periodically scan the map to see if any trains are backed up. Many times, my supply chain has come to a halt because of my not knowing about it.

This is a nice idea but I'm not sure it's practical to implement (stackers would probably count as false positives). They might have to put in a way to flag geographic areas as places where the alert should NOT trigger, and that would be a totally new feature, I think.