No, it was not early in their existence.
Also, as I mentioned earlier, the problem is not usually cars at grade crossings. It's drunks, druggies and suicidal people on the tracks. According to the article I posted above, Brightline was killing an average of one person per month at one point. They killed more than 40 in their first two years of operation.
Brightline claimed that 75% of those deaths were suicides, but I think most discerning readers can figure out where they pulled than number from, LOL. The more rational number is about 30% suicide, according to the article.
I don't know if that PTC is sensitive enough to spot a person, and if it can spot them soon enough to stop a moving train. I'm not saying it isn't; I just don't know.