Before beginning a hazardous-materials trip, what route-related information must the driver verify?
Correct answer: D – Whether permits or special-route requirements apply to the shipment
Some states and counties require permits for transporting hazardous materials or wastes and may restrict the routes that can be used. The driver must determine the applicable requirements and have all necessary papers before starting. The Minnesota CDL manual advises employed drivers to consult their dispatcher and independent drivers to check with the appropriate state agencies.
Source: Minnesota Commercial Driver’s License Manual — § 9.6.5, “Route Restrictions”

