The next few times you're caught behind the RR crossing arms, entertain yourself by reading the contents of the tank cars: Ammonia, ammonium hydrate, sulfuric acid, propane, chlorine, etc. I don't think they label the radioactive waste, but they do send armed guards with it.

That said, it's still the safest way to transport the stuff. Road tankers are still subject to the driving techniques of twits having trouble managing both their latte's and cell phones.

Sue