Is your feature request related to a problem? Please describe.
In older versions of this mod, an announcement would play before the door closed, but this feature has been removed in the new version.

Describe the solution you'd like
This block is capable of broadcasting specified announcements to players within a set range in a set manner.
Examples include train approach, arrival, and door closing announcements.

The block setup page:
Platform: (select platform)
Train approach broadcast content: (text)
When this announcement will be made before the train arrives: (select the length of time 0s-5min)
Train arrival broadcast content: (text)
Whether to enable it: (check box)
Content of door closing announcement: (text)
When this announcement will be broadcast before the train departs: (select the length of time 0s-5min)
Broadcast range: (select range, e.g. 5*5)
Whether to display the broadcast content in the chat bar: (check box)

Additional Information
If voice is enabled in the settings, the block can play a voice synthesized with the specified text, just like the train announcements.
For example: "列车即将进站，请小心列车与站台之间的空隙，本次列车去往xxx及沿途各站。The train is arriving,please mind the gap between the train and the platform.This train will stop service at xxx station."
(This is the Beijing MTR broadcast, the content of the broadcast in simplified Chinese and English is almost the same as MTR)
My English is not very good, sorry.

But...Sometimes Train schedule sensor can help you a lot...(doge)

Hello! You can join our discord and you can speak Chinese there as most of our staff can speak the language. This way your issue can get solved. Thanks! https://discord.gg/V5Ff5BXG.

Please go to #bug-reports.

As people mentioned, you can use the train schedule sensor with command blocks.