After the initial cargo check, what is the longest a truck driver may travel without another check if no break or duty-status change occurs?
Correct answer: B – 3 hours or 150 miles, whichever comes first
Federal rules require a truck or truck-tractor driver to inspect cargo and securement devices within the first 50 miles. During the trip, another examination is required after a duty-status change, three hours, or 150 miles, whichever occurs first. The Massachusetts CDL manual describes breaks as another time to check the load. Limited exceptions apply when cargo inspection is prohibited or impracticable.
Source: Massachusetts Commercial Driver’s License Manual (March 2025) — § 3.1, “Inspecting Cargo”, 49 CFR § 392.9(b) – Inspection of cargo, cargo securement devices and systems

