About ELD


On December 18, 2017, carriers and drivers of commercial motor vehicles (CMVs) subject the ELD mandate will be required to adopt electronic logging devices (ELDs).

The ELD will automatically record a driver’s on-duty and off-duty time, allowing drivers to spend less time preparing logs and more time doing what they do best: driving.

The intended result is a decrease in the frequency of fatigued driving by CMV drivers, reducing crashes, injuries, and fatalities involving large trucks and buses on our highways.

Carriers who install automatic on-board recording devices (AOBRDs) prior to December 18 will be able to use those devices until December 16, 2019, after which point they must upgrade or switch to ELDs.


The main features/functions of the ELD are:

  • Provides separate accounts for drivers and administrative (non-driver) ELD users;
  • Must automatically sense Motion Status, Vehicle Miles, Engine Hours, CMV Position and CMV VIN;
  • Automatically records all driving times at intervals of 60 minutes. Records date, time, location, engine hours, vehicle miles, and driver identification;
  • Records location with an accuracy of one mile radius during on duty driving periods;
  • Reduces location accuracy to a 10 mile radius when the vehicle is used for authorized personal use
  • Is synchronized with UTC (Coordinated Universal Time);
  • Retains data for the current 24 hour period and the previous 7 consecutive days;
  • Prevents tampering - does not allow anyone to alter or erase information originally collected;
  • Requires driver to review unidentified driver records, and either acknowledge assignment of this driving time or indicate that the records do not belong to the driver;
  • Allows a driver to obtain a copy of their ELD records on demand, either through a printout or electronic file;
  • Supports one of two options for electronic data transfer: Telematic type (using wireless web services or email) or Local transfer type (using USB 2.0 or Bluetooth);
  • Displays all required standardized data to authorized safety officials on demand through a screen display or printout that includes three elements: a daily header, graph grid showing driving duty status changes and detailed daily log data. The graph grid, if printed, must be at least 6 inches by 1.5 inches;
  • Requires driver certification and annotation (written explanation) for any edit to the records that are made by the driver or any other ELD user;
  • Requires certification of driver records at the end of each 24 hour period;
  • ELD provider furnishes user’s manual, instructions for handling malfunctions and record-keeping during malfunctions, and instructions for transferring ELD hours of service records to safety officials;
  • Volume control or mute option for any audio feature.


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