California Code, Vehicle Code - VEH § 32100

It is the intent of the Legislature, in enacting this division, to create a special category of inhalation hazards and poison gases and to establish special safeguards for their transportation.

These materials are highly toxic, spread rapidly, and require rapid and widespread evacuation if there is loss of containment or a fire. For these reasons, the Legislature intends to more rigorously restrict and otherwise control the transportation of these materials.