That's the key line in that article. Adding it to Google Maps doesn't fix this. Putting up a sign that says "No idiot, don't turn here" doesn't fix this. Better driver training doesn't fix this. Better working time rules (the driver was "severely fatigued") doesn't fix this.
Grade separation fixes this.
[1] https://www.bts.gov/content/highway-rail-grade-crossings-typ...
The truck driver is reported to have driven along the tracks having turned too early before the intersection at Fifth Street and then having gotten his wheels jammed in the tracks from which he was then unable to extricate it.
It's a little surprising, since you'd think a truck would be high enough to clear the rails, or that he would immediately realise and try to reverse back into the intersection, but I guess panic set in.
Apparently a driver drove onto the railroad tracks after confusing them with a road at night.