Hmmm, the radioactive waste is the safe one.
You should see the containers they ship it in.

The one that got me was the fact they can ship molten metal or explosives on public roads in heavy traffic with nothing but a placard on the truck.

It was only about 15 or 20 years ago cities started designating hazardous material routes. Before that trucks and trains would regularly haul the most dangerous things imaginable through some of the most densely populated areas on the map.