This mod adds a GUI to display train-related alerts.

The UI is semi-transparent and can be toggled with both a hotkey and a GUI button. It can be set to open automatically when new alerts are detected, allowing you to quickly respond to issues with your train network.. Alerts are removed automatically when the train changes state.

Currently available states:
- train in manual mode
- train has no path
- train has no schedule
- train waiting at station (trains waiting at an LTN depot never trigger this)
- train waiting at signal

For each state, a separate timeout can be specified. Setting a timeout value of -1 disables the alert entirely, while a setting of 0 displays an alert immediately.

Each alert is clickable and opens the GUI of the corresponding train to quickly figure out what caused the issue. Alerts can be turned off and timeout values adjusted for individual trains. Waiting-at-station/signal alerts can be turned off for each train stop or signal.