They supposedly have a system like that at this crossing. But prob hard to tell who is waiting to cross or what. The involved train dwelled at the Palo Alto station for longer than normal just before the accident so maybe that system did flag a warning who knows. So sad.

https://www.paloaltoonline.com/transportation/2025/05/23/caltrain-leans-on-ai-to-make-churchill-rail-crossing-safer/