When reflective triangles are used as the required warning devices, how many must a commercial power unit carry?
Correct answer: C – 3
Federal equipment regulations require three bidirectional emergency reflective triangles when triangles are used as the required warning-device option. The triangles must conform to the applicable federal safety standard. The Arkansas CDL manual likewise directs drivers to check that three red reflective triangles are carried with the vehicle's emergency equipment.
Source: Arkansas Commercial Driver License Manual — § 2.1.5, “Seven-step Inspection Method—Check Emergency Equipment”, 49 CFR § 393.95(f)(1) — Emergency equipment on all power units


