Regulations governing driver hours of service (HOS) exist to prevent accidents caused by driver fatigue. These regulations specify limits on driving time, on-duty time, and required off-duty and rest periods. For example, in the United States, property-carrying drivers using the standard hours-of-service rules may drive a maximum of 11 hours after 10 consecutive hours off duty.
These rules are critical for maintaining road safety and protecting both truck drivers and the motoring public. Fatigue is a significant factor in many accidents, and HOS regulations aim to mitigate this risk. Historically, such regulations have evolved alongside the trucking industry, adapting to changing vehicle technology, road conditions, and scientific understanding of driver fatigue. Early regulations were less comprehensive, but over time, they have become more stringent and data-driven to maximize their effectiveness.
