If transporting mass explosives:

Question

For some hazardous materials, placards are only required to be used if 1,001 pounds or more are being carried by a vehicle. For others, including mass explosives, placards are required to be used when carrying any amount of the material.

Accepted Answer

The vehicle must always be placarded.

Answer

The vehicle only needs to be placarded if carrying more than 200 pounds.

Answer

The vehicle does not need to be placarded.

Answer

Only rural roads should be used.