Which hazardous-material classes may not be carried as overhanging or tailgate loads?
Correct answer: D – All three listed classes
For hazardous-material transport in Arkansas, federal requirements prohibit overhang or tailgate loads involving Class 1 explosives, Class 4 flammable solids, and Class 5 oxidizers. These materials must be carried in an appropriate closed cargo space or under the permitted fire- and water-resistant protection. The purpose is to keep packages properly contained and protected during transportation.
Source: Arkansas Commercial Driver License Manual — § 9.4.1, “General Loading Requirements”, 49 CFR § 177.835 – Class 1 (Explosive) Materials, 49 CFR § 177.838 – Class 4 (Flammable Solid) Materials, Class 5 (Oxidizing) Materials, and Division 4.2 (Spontaneously Combustible) Materials

