How Many Hours Can a Truck Driver Work

Understanding the hours a truck driver can work is essential for safety, compliance, and productivity. This article explains the federal Hours of Service (HOS) rules set by the FMCSA, including driving time limits, on-duty time, rest requirements, and common exemptions. It also offers practical tips for staying compliant and planning routes to maximize efficiency while meeting legal obligations.

Key Federal Hours Of Service Rules

The Federal Motor Carrier Safety Administration (FMCSA) establishes Hours of Service (HOS) regulations that govern when and how long commercial drivers may drive and work. These rules apply to property-carrying motor carriers and drivers operating in interstate commerce, with some exemptions for specific operations and regional drivers.

• 11 hours of driving time allowed in a 14-hour on-duty period. After completing 11 driving hours, a driver must not drive again until the 11-hour clock is reset by a period off duty. Driving beyond this limit is a violation.
• 14-hour on-duty limit in a rolling 24-hour period. This clock starts when a driver first begins any on-duty work that day. Once the 14 hours on duty are used, the driver must stop driving and cannot restart until they have taken a minimum of 10 consecutive hours off duty or completed a sleeper-berth period as allowed by the rules.
• 60/70-hour on-duty limit in a rolling period. A driver may not drive after accumulating 60 hours on duty in a 7-day period or 70 hours in an 8-day period. The choice of 7- or 8-day periods depends on the carrier’s schedule and company policy, but the rolling period must be consistently applied.
• Restart provision requires at least 34 consecutive hours off duty to reset the 60/70-hour clock. The restart must include two rest periods between 1 a.m. and 5 a.m. (local time) if those hours occur during the restart period.
• Sleeper berth and off-duty time periods can be combined to satisfy rest requirements. The sleeper-berth provision allows certain off-duty time to be spent in a berth, provided the driver meets minimum off-duty time and other conditions.

Driving Time Limits And Rest Requirements

Driving time is the portion of on-duty time during which the driver is actually operating the vehicle. The 11-hour driving limit is the core measure ensuring drivers do not exceed safe levels of fatigue from continuous highway operation. The 14-hour on-duty clock encompasses all work activities, including driving, loading, unloading, fueling, and waiting time.

To stay compliant, drivers must track two clocks: the driving clock (11 hours) and the on-duty clock (14 hours). Once the 14-hour limit is reached, drivers must take a break that resets the clock, typically by going off duty for at least 10 consecutive hours, though sleeper-berth arrangements may contribute to rest in some cases. It is essential to distinguish between on-duty time and off-duty time, as time spent waiting without pay or other non-driving tasks still counts as on-duty time.

On-Duty Limits And Scheduling

The 60/70-hour on-duty limits add a long-term planning layer to daily driving. For fleets operating across state lines or in tight delivery windows, managing the rolling 7- or 8-day period is crucial to prevent violations and avoid penalties. Carriers may choose either a 7-day or an 8-day cycle, but must apply it consistently within their fleet. Exceeding the on-duty cap triggers a requirement to rest before resuming driving.

Practical implications include:

• Schedule drivers to ensure a safe balance between daily driving limits and weekly hours.
• Plan rest breaks to occur before the 14-hour on-duty limit is reached, reducing the risk of forced violations.
• Use fleet management software to monitor hours in real time and alert when approaching limits.

34-Hour Restart Details

The 34-hour restart is designed to allow drivers to reset the 60/70-hour clock after prolonged periods of on-duty time. The restart must be completed off duty, or in sleeper berth time as allowed by the rules, for 34 consecutive hours. Authorities require that the restart include two periods between 1 a.m. and 5 a.m. (local time) to ensure adequate nighttime rest opportunities. The restart is intended to provide a substantial break from driving to reduce fatigue risk.

Key considerations:

• Use the restart strategically after hitting the rolling hour limit, not as a routine daily reset.
• Coordinate with dispatch to avoid unnecessary downtime or penalties when restarting.
• Document off-duty status accurately to demonstrate compliance during audits.

Short-Haul And Exemptions

Some operations fall under exemptions that affect hours calculations. The short-haul exemption applies to drivers who operate within 100 air-miles of a designated work reporting location and who return to that location and are released from duty within 12 hours. Under this exemption, drivers may operate with:

• Up to 12 hours on duty, including driving, and
• Not subject to the 60/70-hour on-duty limit, provided the driver returns to the work reporting location and is released from work within the 12-hour window.

Other exemptions exist for specific agricultural, private fleet, and certain motor carriers, as well as professional drivers operating in particular regions or under state preemption. It is essential to verify eligibility with the carrier and ensure proper documentation and policy implementation.

Practical Tips For Compliance

• Maintain precise logs using a compliant electronic logging device (ELD) or automatic on-board recording device (AOBRD). Accurate logs help prevent inadvertent violations and simplify audits.
• Plan routes with rest opportunities that align with the 1 a.m. to 5 a.m. restart requirement when using the 34-hour restart.
• Implement a company policy for 7- or 8-day cycles, ensuring all drivers and dispatch staff understand the chosen cycle and how it affects scheduling.
• Use real-time scheduling dashboards to monitor driving time, on-duty time, and upcoming limits, enabling proactive adjustments.
• Educate drivers on the difference between on-duty time and off-duty time, emphasizing the importance of true rest for safety and compliance.

Common Scenarios And Examples

Scenario 1: A driver begins at 6 a.m. and drives for 9 hours, then spends 3 hours off duty for meals and paperwork, reaching the 14-hour on-duty limit but still within the 11-hour driving limit. The driver must stop driving and go off duty until the next driving window occurs, resetting the clock with sufficient rest.

Scenario 2: A driver has accumulated 60 hours on duty over a 7-day period and reaches the threshold. The driver can continue driving only if the 34-hour restart is taken off duty, including two periods between 1 a.m. and 5 a.m. to reset the cycle.

Scenario 3: A driver operates within 100 air miles under the short-haul exemption. The driver may stay within 12 hours on duty per day and avoid the 60/70-hour on-duty limit, provided local rules and dispatch policies are followed and the driver returns to the home terminal as required.

Key Takeaways For Truck Drivers And Fleets

Understanding HOS rules helps ensure safety, compliance, and efficiency. Drivers should track two clocks—driving time (11 hours) and on-duty time (14 hours)—and plan rests to avoid violations. The 60/70-hour limit and the 34-hour restart are critical for long-haul planning, while exemptions like the short-haul rule offer flexibility for eligible operations. Fleets should deploy robust ELDs, standardized cycles, and clear rest strategies to minimize downtime and maximize legal, safe operation.