“lawsuit for not having barriers or a dirt berm in place”
case A - barrier would have stopped car - impact would be comparable
case B - barrier would not have stopped car - car would still go flying
If a dirt mound is not feasible, crash barrels full of sand could be used.
This specific location may not require a crash barrier because it's a railway underneath, not a roadway or a walkway.
I couldn't find a picture online of twin spans with dirt mounds between them on both ends but I included a link to two spans on I-79 in Pennsylvania north of I-80 that has dirt mounds. If you go down to street view, you can see the overgrown mounds that would stop a vehicle from dropping onto the roadway below. They don't look like much but they work.
Granted, this pickup truck at high speed may not have been stopped but then again, the mounds are designed to stop a tractor-trailer, so the driver of this pickup might have buried the front bumper into the dirt. The difference in impact may have been significant since it would not include the drop and would allow the front crumple zone to absorb some of the impact as well as better align the airbags with the point of impact.
https://www.google.com/maps/place/41%C2%B016'40.7%22N+80%C2%B009'40.1%22W/@41.277978,-80.1617707,206