Supply Chain Glossary

This supply chain glossary terms provides detailed explanations through our mini blogs. Continue reading to increase your vocabulary and gain insight into the supply chain visibility with these terms!

Electronic Logging Devices (ELD)

Last updated: November 25, 2025
Logistics Supply Chain
E

Electronic Logging Devices (ELDs) are digital tools used in commercial trucking to automatically record a driver’s hours of service (HOS), vehicle movement, and engine activity. Mandated in many countries to improve road safety and compliance, ELDs help ensure drivers don’t exceed legal driving limits and provide a reliable alternative to traditional paper logs. They also support fleet visibility and vehicle health monitoring.

How ELDs Work?

An ELD is connected directly to the vehicle’s engine control module (ECM). Once the vehicle starts moving, the ELD automatically begins recording data such as driving time, engine hours, vehicle speed, location, and mileage. This information is transmitted to a central fleet management system, allowing supervisors to track driver compliance in real-time. Drivers can view their logs via a mobile app or in-cab display and are alerted when they approach rest or driving limits.

Key Features of ELDs

Automatic HOS Recording
Accurately captures hours of service to ensure compliance with federal driving regulations and reduce driver exhaustion-related incidents.

Driver Alerts and Notifications
Sends real-time alerts to drivers when they’re nearing mandatory rest breaks or HOS limits to prevent violations.

Vehicle Diagnostics
Tracks key vehicle parameters like engine faults, fuel usage, and idle time, helping maintenance teams schedule repairs proactively.

Benefits of Using ELDs

Regulatory Compliance
Helps fleets meet government-mandated HOS regulations and reduces the risk of fines or penalties during inspections.

Improved Safety
Minimizes the risk of driver exhaustion and accidents by enforcing rest periods and limiting driving hours.

Operational Visibility
Fleet managers gain insights into driver behavior, route efficiency, and vehicle performance, enhancing planning and accountability.

Conclusion

Electronic Logging Devices are transforming the way commercial vehicles manage compliance and safety. By automating HOS tracking, improving operational oversight, and supporting vehicle diagnostics, ELDs promote safer roads and more efficient logistics. For modern transportation companies, ELDs are more than just a compliance tool—they are a cornerstone of smart vehicle management.