Under the Federal Motor Carrier Safety Regulations (FMCSR) 70-hour/8-day rule for property… — Commercial Driver's License (CDL) General Knowledge Exam

Under the Federal Motor Carrier Safety Regulations (FMCSR) 70-hour/8-day rule for property-carrying carriers operating vehicles every day of the week, a commercial driver has accumulated the following on-duty hours over the past $7$ consecutive days:

- Day 1: $9.5\text{ hours}$
- Day 2: $8.0\text{ hours}$
- Day 3: $10.0\text{ hours}$
- Day 4: $9.0\text{ hours}$
- Day 5: $8.5\text{ hours}$
- Day 6: $9.0\text{ hours}$
- Day 7: $7.5\text{ hours}$

Assuming the driver has not taken a $34$ -hour restart, how many total on-duty hours does the driver have available on Day 8 before reaching the $70$ -hour maximum limit?

Answer: 8.5 hours

Answer

8.5 hours

Under the Federal Motor Carrier Safety Regulations (FMCSR) Part 395, property-carrying carriers operating every day of the week are subject to the 70-hour/8-day rule. The driver accumulated a total of

61.5\text{ hours}

on duty from Day 1 through Day 7 (

9.5 + 8.0 + 10.0 + 9.0 + 8.5 + 9.0 + 7.5 = 61.5

). Subtracting

61.5\text{ hours}

from the

70.0\text{ hours}

ceiling leaves exactly

8.5\text{ hours}

of available on-duty time before reaching the maximum limit on Day 8.

Step-by-Step Solution

Sum the total on-duty hours accumulated over the previous 7 consecutive days.

Total accumulated time is

61.5\text{ hours}

(

9.5 + 8.0 + 10.0 + 9.0 + 8.5 + 9.0 + 7.5 = 61.5

Under the 70-hour/8-day rule, all on-duty time across the consecutive 8-day rolling window counts toward the cumulative limit.

Subtract the accumulated 7-day total from the 70-hour maximum allowable limit.

Available on-duty hours on Day 8 is

8.5\text{ hours}

(

70.0 - 61.5 = 8.5

A driver may not drive after accumulating 70 on-duty hours in any 8 consecutive days until hours drop off or a qualifying 34-hour restart is completed.

Key Concept

Calculation of available on-duty hours under the FMCSR 70-hour/8-day cumulative limit

Estimated Time:1m 0s

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