Which scenario would be prohibited from driving under federal hours of service?

• A. A driver who has just completed a 12-hour shift
• B. A driver on cycle 2 who has accumulated 120 hours of on-duty time in 12 days
• C. A driver who has taken 8 hours off in the last 24 hours
• D. A driver who has completed a 36-hour reset and is transitioning between cycles

Answer: (B)

Federal hours of service use cycle-based limits on on-duty time. In cycle 2, the maximum on-duty time allowed in a 12‑day window is 120 hours. If a driver reaches that 120-hour mark within 12 days, they are not permitted to drive again until they reset or the cycle changes, because continuing would exceed the allowed on-duty time. So this scenario would be prohibited from driving.

The other situations stay within the rules: completing a 12‑hour shift stays under the daily limit, taking 8 hours off within the last 24 hours satisfies the minimum rest requirement, and a 36‑hour reset is how a driver transitions between cycles and refreshes the allowable on‑duty time.