Train crossings can be accident prone. Cars/trucks stuck on tracks, people standing on them, etc.
The idea here is to have parallel train crossings.
Imagine you have a road with a train crossing. Then, you have another crossing 1/2 mile down the road from the first. These two crossings are connected
by a Y on either side of them, about two miles from the crossing, so a train going either direction can use either crossing.
Both crossings have the usual lights, bells, and gates, as well as a CCTV camera that can be viewed by the train conductor. (See link to Train TV idea.) The gates at both crossings come down at the same time.
This setup allows a conductor to view what is on the tracks at the two crossings. If there is a car stuck on the tracks of crossing 1, the conductor can use a switch in the train to direct it to the unblocked crossing, preventing an accident. After all, what is the chance that BOTH crossings are blocked at the same time?
Also, this would lower the suicide-by-train rate, as the conductor would simply use the other crossing.