Devices that record the number of hours a driver is on duty each day, which replaced paper logs in April 2018. An ELD synchronizes with a vehicle's engine to automatically record duty status when the ignition is turned on. Driving time is recorded after the speed exceeds five miles per hour. Drivers must follow the following guidelines: 1) 11 working hours per day 2) a 10-hour off-duty period 3) 60 hours over seven days or 70 hours over eight days.