Transportation Operations LINCS Practice Exam

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What does an Electronic Logging Device (ELD) primarily track?

The speed of the truck
The Hours of Service (HOS) compliance
The cargo load weight
The fuel consumption of the truck

The correct answer is: The Hours of Service (HOS) compliance

An Electronic Logging Device (ELD) primarily tracks Hours of Service (HOS) compliance for commercial drivers. This device records driving time, on-duty time, and off-duty time, ensuring that drivers adhere to federal regulations that limit the number of hours a driver is allowed to operate a vehicle without rest. By automatically logging these hours, ELDs help promote safety by preventing driver fatigue and ensuring that operators take necessary breaks. In contrast, while the other options may be important aspects of vehicle operation, they are not the primary function of an ELD. Speed tracking, cargo weight, and fuel consumption can be monitored by other devices or systems, but ELDs are specifically designed to support on-duty and off-duty hour documentation and compliance with HOS regulations.