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What is Hours of Service (HOS) Regulations and Logbook?


Hours of Service & Logbook Program

Hours of Service (HOS) regulations and logbooks are critical components of the trucking industry, playing a fundamental role in ensuring the safety of commercial drivers, other road users, and the integrity of the transportation system. HOS regulations govern the number of hours a commercial driver is allowed to operate a commercial motor vehicle (CMV) in a given workday and workweek.

These rules are designed to prevent driver fatigue and reduce the risk of accidents caused by drowsy driving. Drivers are required to maintain accurate and up-to-date logbooks.

Commercial drivers are subject to two primary sets of HOS regulations in the United States:

Federal Motor Carrier Safety Administration (FMCSA) Regulations:

The Federal Motor Carrier Safety Administration (FMCSA) plays a crucial role in regulating the hours of service (HOS) for commercial drivers engaged in interstate commerce in the United States. These HOS regulations are designed to enhance road safety by minimizing driver fatigue and preventing accidents caused by drowsy driving. Key FMCSA regulations include:

The 11-Hour Driving Limit: Commercial drivers are allowed a maximum of 11 hours of driving after having been off duty for at least 10 consecutive hours. This rule is often referred to as the “11-hour rule.” It ensures that drivers get adequate rest between driving shifts, reducing the risk of fatigue-related accidents.

The 14-Hour Limit: Under this regulation, a driver may not be on duty (which includes driving and non-driving work) for more than 14 consecutive hours, counted from the beginning of their workday. After this 14-hour window, the driver must take a rest break. Importantly, the 14-hour limit includes the 11 hours of driving, emphasizing the need for efficient use of time during a workday.

The 60/70-Hour Limit: To prevent long hours and overexertion, drivers are subject to weekly limits. They may not work more than 60 hours in a 7-day period or 70 hours in an 8-day period, depending on their employer’s operations. This rule, known as the “60/70-hour rule,” encourages drivers to manage their time effectively and take adequate rest breaks to maintain safe and sustainable work schedules.

These FMCSA regulations aim to strike a balance between allowing commercial drivers to carry out their duties efficiently and ensuring that they have sufficient time for rest and recovery. Compliance with these regulations is essential for preventing driver fatigue, enhancing road safety, and maintaining a level playing field among carriers in the trucking industry. Violations can result in penalties, fines, and potential suspension of driving privileges. To record their compliance with HOS regulations, commercial drivers maintain logbooks or use Electronic Logging Devices (ELDs) to provide accurate and verifiable records of their activities.

State-Specific Regulations:

In addition to the federal regulations set forth by the Federal Motor Carrier Safety Administration (FMCSA), some U.S. states have their own state-specific hours of service (HOS) regulations that apply to intrastate (within state) operations. These state-specific rules can be more restrictive and demanding than the federal regulations.

For example, a state may require shorter daily driving limits, longer off-duty periods, or additional rest breaks. Commercial drivers operating solely within a particular state must adhere to both federal and any applicable state-specific HOS regulations, ensuring compliance with the more stringent rules. State-specific regulations aim to address unique regional concerns and promote road safety tailored to the specific needs and conditions of each state.

Logbooks (HOS Logs):

Logbooks, also known as Hours of Service (HOS) logs, are detailed records maintained by commercial drivers to document their daily activities. These logbooks serve as a historical record of a driver’s work and rest periods. Key information recorded in logbooks includes the date, total miles driven, hours spent on-duty but not driving, and cumulative hours of driving. Logbooks are instrumental in demonstrating a driver’s compliance with HOS regulations during inspections, audits, and compliance reviews. Traditionally, paper logbooks were used for this purpose, but in the United States, they have largely been replaced by Electronic Logging Devices (ELDs) for enhanced accuracy and efficiency. ELDs automatically record a driver’s driving hours, reducing the likelihood of errors or falsification.


HOS regulations and logbooks are of paramount importance for several reasons:

Safety: They are essential for preventing driver fatigue, a leading cause of accidents, which can result from excessively long work hours and lack of rest. Compliance with HOS regulations significantly reduces the risk of accidents caused by drowsy driving, enhancing road safety for all.

Fair Competition: They ensure a level playing field among carriers and drivers by subjecting them to the same rules. This promotes fair competition within the trucking industry.

Compliance: HOS regulations and logbooks assist regulatory authorities in enforcing transportation rules and regulations. They enable authorities to verify that drivers and carriers adhere to safety standards, and non-compliance can result in penalties.

Documentation: Logbooks provide a historical record of a driver’s activities, serving as a valuable reference for various purposes, including dispute resolution, auditing, and record-keeping. Logbooks are an essential tool for maintaining accurate records of a driver’s work history and adherence to HOS regulations.

Overall, HOS regulations and logbooks are essential elements of the trucking industry, contributing to road safety, regulatory compliance, and fair competition among carriers.

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