Trucking Terms Guide

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ELD and HOS Terms

ELD and HOS vocabulary affects every driver who operates under federal hours-of-service rules. The terms here describe what gets recorded, what triggers a violation, and what a roadside inspector expects to see when they review the logs.

The 14-hour clock does not pause

Once a driver goes on duty, the 14-hour on-duty window counts down regardless of breaks, detention, or waiting time. Planning around appointments means knowing how much window is left, not just how much drive time.

Duty status categories matter

Driving, on-duty not driving, off-duty, and sleeper berth each have specific rules about when they apply and how they count toward the daily and weekly limits. Personal conveyance and yard move are special statuses with their own conditions.

ELD records need supporting documents

The device records engine data automatically, but supporting documents — fuel receipts, bills of lading, and toll records — must be kept and available to match against the logs during a review or inspection.

How these terms show up on a load

Freight vocabulary gets clearer when it is tied to the load flow. Before pickup, the rate confirmation sets the commercial agreement, the appointment details, the equipment requirement, and the basic expectations for detention, driver assist, lumper fees, or special handling. At pickup, the bill of lading and shipper instructions become the working record for what was loaded and where it is going.

After delivery, the focus moves to proof. The POD, receiver signature, lumper receipt, seal notes, and any delay documentation support the invoice packet. If a broker or factoring company pushes back, the office usually has to show what happened with documents rather than a general explanation.

Pricing terms need the same discipline. Spot rate, contract rate, linehaul, all-in rate, fuel surcharge, and accessorial charge can sound simple until a delay happens. A dispatcher should know which charges are included, which require approval, and which need timestamps or receipts before the truck leaves the facility.

What to check in the file

  • Confirm pickup and delivery appointments against the rate confirmation.
  • Match BOL, POD, lumper receipt, and detention notes before invoicing.
  • Ask how accessorials must be approved before the load is accepted.
  • Track loaded, empty, and deadhead miles when comparing rates.
  • Keep broker emails and load notes with the load file.

Common questions

What are the FMCSA hours-of-service limits for property-carrying drivers?
Under the current HOS rules (effective September 29, 2020), a property-carrying driver may drive a maximum of 11 hours after 10 consecutive hours off duty. The driver must stop driving by the end of the 14th consecutive hour after coming on duty, regardless of how many driving hours remain. The weekly driving limit is 60 hours in 7 consecutive days or 70 hours in 8 consecutive days. After reaching the weekly limit, a driver must take a 34-hour restart (34 consecutive hours off duty) to reset the weekly hours. A 30-minute break is required after 8 hours of driving time, though the 2020 rule allows the break to be taken as off-duty or sleeper berth time rather than requiring a full stop.
Who is required to use an ELD and are there any exemptions?
Most commercial motor vehicle drivers who are required to keep records of duty status (RODS) must use an FMCSA-registered electronic logging device (ELD). Key exemptions include: drivers who operate within 150 air miles of their home terminal and return within 14 hours (short-haul exemption allowing paper logs or no logs); drivers in vehicles manufactured before model year 2000; drivers who use paper RODS for no more than 8 days out of any 30-day period; and drivers of driveaway-towaway vehicles. Agricultural operations and certain utility work vehicles also have specific exemptions. Carriers should verify the current FMCSA exemption list — exemptions have specific conditions and it is the carrier's responsibility to confirm eligibility before relying on an exemption.
What is the split sleeper berth provision under the current HOS rules?
The split sleeper berth provision allows a team driver (or a solo driver in a truck with a sleeper) to split the required 10-hour off-duty period into two segments: one segment of at least 7 consecutive hours in the sleeper berth, and a second segment of at least 2 consecutive hours (either in the sleeper berth or off duty, or a combination). Under the 2020 HOS rule change, neither segment of the split counts against the 14-hour driving window — the window "pauses" during the sleeper berth time. Both segments must be completed before the driver can fully reset. The split sleeper provision is complex; the specific restart sequence and window calculations depend on which segment is taken first and the timestamps of each segment.

Hours rules

Adverse Driving Conditions Unexpected conditions that may affect certain hours-of-service calculations under the rules. HOS Hours of service, the rules limiting and tracking commercial driver work and driving time. Sleeper Berth The sleeper compartment in a truck and a log status used for qualifying rest periods. Split Sleeper A way to split qualifying sleeper berth rest periods under HOS rules.

Logs

AOBRD Automatic onboard recording device, an older electronic log device category largely replaced by ELD rules. Audit Trail A record of changes or events in a logging system that helps explain how driver log data changed. Duty Status A driver log category such as driving, on duty, off duty, or sleeper berth. ELD Electronic logging device, equipment used to record driver hours-of-service data. Off Duty Driver time relieved from work responsibility and not performing carrier work. On-Duty Not Driving Time when a driver is working but not driving, such as loading checks or inspections. Personal Conveyance Off-duty movement of a commercial motor vehicle for personal use when conditions are met. RODS Records of duty status, the driver log record for work, driving, off-duty, and sleeper time. Supporting Documents Business documents used to support or verify a driver's records of duty status. Yard Move A special driving status used for movement in a yard rather than over-the-road driving.