Where should a driver look for the emergency response telephone number for a hazmat shipment?
Correct answer: C – On the shipping papers
Federal hazmat rules generally require an emergency response telephone number on the shipping paper unless an exception applies. The Virginia CDL manual explains that responders use this number to obtain information about materials involved in a fire or spill. Placards and the Emergency Response Guidebook do not provide the shipment’s required contact number.
Source: Virginia Commercial Driver’s License Manual — § 9.3, “Communication Rules”, 49 CFR § 172.604 — Emergency Response Telephone Number

