Hours of Service & ELD Basics for Fleet Managers

Hours of service (HOS) rules exist to keep tired drivers off the road, and they shape your dispatching whether you like it or not. A fleet manager who understands the limits can plan loads that stay legal; one who doesn’t will keep getting surprised by stranded trucks and violation points. Here are the core rules for property-carrying commercial vehicles. Confirm the current regulations before you rely on them — the FMCSA updates the details.

The four numbers that matter

For most property-carrying drivers, the core limits work together like this after a driver takes at least 10 consecutive hours off duty:

11-hour driving limit — maximum 11 hours of actual driving.
14-hour window — all driving must happen within 14 consecutive hours of coming on duty; the clock doesn’t pause for lunch, fuel, or loading.
30-minute break — required after 8 cumulative hours of driving time.
60/70-hour limit — no driving after 60 hours on duty in 7 days, or 70 hours in 8 days, depending on your operation’s schedule.

The 14-hour window trips people up most. Once it starts, only 10 hours off duty resets it. Burning the window sitting at a dock counts against the driver just as much as driving does.

The 34-hour restart

A driver can reset the weekly 60/70-hour clock by taking 34 consecutive hours off duty. That’s how a busy driver gets back to a full week of available hours. Build it into your scheduling rather than treating it as an afterthought.

Sleeper-berth splits

Team and long-haul operations lean on the sleeper-berth provision, which lets a driver split required off-duty time into qualifying periods (commonly an 8/2 or 7/3 split) without restarting the 14-hour clock for the longer rest. The exact qualifying combinations are spelled out in the regulation — get them right, because a botched split turns into a violation.

ELDs do the recording

Most drivers must use an Electronic Logging Device (ELD) that connects to the engine and automatically records driving time, duty status, and location. The ELD removes the “creative paper log” but also removes your excuses — the record is automatic, time-stamped, and exactly what an inspector or auditor pulls. Train drivers to manage duty status correctly (especially on-duty-not-driving versus off-duty), keep the device’s required documentation in the cab, and have a backup plan for malfunctions.

Know the exceptions

A few exceptions can legitimately give you breathing room when they apply: the short-haul exception (which can relieve ELD and some logging requirements for drivers who stay within a set air-mile radius and return to base within the daily window), the adverse driving conditions extension, and various agricultural and emergency provisions. They have specific conditions — use them by the book, not by reputation.

Manage it as a scheduling problem

The fleets that stay clean treat HOS as a planning input, not a compliance afterthought. Dispatch with the driver’s remaining hours in view, watch for the 14-hour window closing before the load is delivered, and don’t pressure a driver into a violation to save a delivery — a single severe HOS violation can cost far more in points, fines, and CSA score than a late load. Plan the hours the way you plan the fuel.