I find it very hard to believe that Cal-OSHA would allow a hazard on the public roads like this. In fact, how would the driver be able to transport the shipment? Would he wear a lead suit?
Another question is how is the original materiel transported to where it is used right now? Are we to believe we are exposed to that too?
I believe the material would have to be transported in a way that would not endager the public ... a lead-lined trailer? drop it at the site via air?
See where I'm going here? Something to think about.