How to Plan Loads Around Hours of Service: A Dispatcher’s Checklist That Keeps Every Promise Legal

Every bad dispatch starts the same way. Somebody looks at a map, eyeballs the miles, and tells a customer “it’ll be there tomorrow morning” without ever checking the driver’s clocks. Then the driver either runs late, runs illegal, or calls in furious. None of those outcomes is acceptable.

If you’re new to the desk, or you manage the people sitting at it, learning how to plan loads around hours of service is the single most valuable skill you can build. HOS isn’t the driver’s problem to solve after you’ve booked the load. It’s a constraint you plan around before you ever say yes to the broker.

Why HOS Planning Is the Dispatcher’s Job

Federal law puts the pressure on you, not just the driver. Under 49 CFR 390.6(a)(1), motor carriers, shippers, receivers and transportation intermediaries “may not coerce a driver of a commercial motor vehicle to operate such vehicle in violation of” the safety regulations, and that includes the hours-of-service rules in part 395. Under 49 CFR 390.5, coercion starts with “a threat by a motor carrier, shipper, receiver, or transportation intermediary” to withhold work or take adverse action against a driver who says the job would break the rules.

Translation: if a driver tells you the clocks won’t work and you threaten to pull their work or freight until they run it anyway, that’s coercion, and the regulations specifically address it. The better fix is simpler. Never make the promise in the first place.

The Clocks Every Load Has to Fit Inside

The current HOS framework comes from the FMCSA final rule “Hours of Service of Drivers,” 85 FR 33396, published June 1, 2020 and effective September 29, 2020. For property-carrying drivers, it boils down to a handful of limits that all run at the same time. A plan has to clear every one of them, not just the one you remember.

The Reset: 10 Hours Off

Before driving, a property-carrying driver must have taken 10 consecutive hours off duty (49 CFR 395.3(a)(1)). That reset starts the next duty day. If your driver hasn’t had their full 10, they don’t have a fresh day, no matter what the load board says.

The 14-Hour Window

Once a driver comes on duty after those 10 hours off, the 14-hour window starts. Under 49 CFR 395.3(a)(2), “a driver may not drive after a period of 14 consecutive hours after coming on-duty.” The key word is consecutive. The window doesn’t pause for lunch, a long line at the shipper, or a receiver who won’t answer the door. It’s wall-clock time, and it keeps running.

The 11-Hour Driving Limit

Inside that 14-hour window, a driver may drive a total of 11 hours (49 CFR 395.3(a)(3)(i)). Driving time means “all time spent at the driving controls of a commercial motor vehicle in operation” (49 CFR 395.2). Whichever limit hits first, the 11 or the 14, ends the driving day.

The 30-Minute Break

Driving isn’t allowed once more than 8 hours of driving time have passed without at least a consecutive 30-minute interruption in driving status (49 CFR 395.3(a)(3)(ii)). The good news for planners: that break “may be satisfied either by off-duty, sleeper berth or on-duty not driving time.” A fuel stop or loading time can count. Build it into the route anyway, because it still burns window time.

The 60/70-Hour Limit and the 34-Hour Restart

This is the clock new dispatchers forget. Carriers that don’t operate every day of the week fall under the 60-hour limit: no driving after being on duty 60 hours in any 7 consecutive days (49 CFR 395.3(b)(1)). Carriers that operate every day fall under the 70-hour limit: no driving after being on duty 70 hours in any 8 consecutive days (49 CFR 395.3(b)(2)).

A driver can reset that period with an off-duty stretch of 34 or more consecutive hours (49 CFR 395.3(c)). Know where every driver stands on this clock before you plan their week, not halfway through it.

What Counts as On-Duty Time

Here’s where plans fall apart. On-duty time is “all time from the time a driver begins to work or is required to be in readiness to work” (49 CFR 395.2). It counts against both the 14-hour window and the 60/70-hour limit. That includes:

• Loading and unloading. “All time loading or unloading a commercial motor vehicle” is on-duty time.
• Waiting to be dispatched, “unless the driver has been relieved from duty by the motor carrier.”
• Fuel stops and other non-driving work. They may satisfy the 30-minute break, but they’re still on-duty time.

Detention doesn’t just cost money. It eats the window and the weekly clock at the same time.

A Worked Example: The Load That Looks Fine on Paper

A broker offers you a load. Your routing shows 10 hours of driving from shipper to receiver. Your driver just finished 10 consecutive hours off, so they have a full 11 hours of driving and a fresh 14-hour window. Looks like an easy yes.

Now check the rest. Your carrier runs every day, so the driver is on the 70-hour limit. Their logs show 60 hours on duty in the last 8 consecutive days. That leaves 10 hours of on-duty time on the weekly clock.

Clock Check: The 70

The trip needs 10 hours of driving, and the driver has exactly 10 hours of on-duty time left. Any other on-duty time before or during the trip, whether loading, waiting at the dock, or a fuel stop, pushes them past 70 before they reach the receiver. On this clock alone, the load fails.

Clock Check: The 14

Say the shipper runs behind and loading plus detention takes 7 hours. That time is on duty, and the window started when the driver did. With 7 hours of the 14-hour window gone, only 7 remain, and the trip needs 10 hours of driving. The 11-hour limit isn’t the problem here. The window closes first.

The Fix

You have honest options. Give the load to a driver with a fresher weekly clock. Schedule a 34-hour restart before this pickup. Or tell the broker the real delivery time up front, built around a legal 10-hour break. What you don’t do is promise the morning appointment and hope.

Exceptions That Change the Math, and Their Limits

Split Sleeper Berth

A driver can split the required rest into two periods. One must be “at least 7 consecutive hours in the sleeper berth” (49 CFR 395.1(g)(1)(ii)(B)), neither period may be shorter than 2 consecutive hours (49 CFR 395.1(g)(1)(ii)(A)), and the two must total at least 10 hours (49 CFR 395.1(g)(1)(ii)(C)). Qualifying split-sleeper periods are left out when calculating the 14-hour window (49 CFR 395.1(g)(1)(iii)(B)). That’s a real planning tool for long hauls, but coordinate it with the driver. It’s their rest.

Short-Haul Exception

For local work, the short-haul exception requires the driver to operate “within a 150 air-mile radius (172.6 statute miles) of the normal work reporting location” and be “released from work within 14 consecutive hours” (49 CFR 395.1(e)(1)). Property-carrying drivers must have at least 10 consecutive hours off duty separating each 14 hours on duty (49 CFR 395.1(e)(1)(iii)(A)). Step outside the radius and the exception is gone.

Adverse Driving Conditions

A driver who meets the conditions may drive “not more than two additional hours beyond the maximum allowable hours” (49 CFR 395.1(b)(1)). Adverse conditions include “snow, ice, sleet, fog, or other adverse weather conditions or unusual road or traffic conditions” (49 CFR 395.2).

Here’s the catch dispatchers need to burn into memory: the exception only covers conditions that weren’t known, or couldn’t reasonably be known, “to a motor carrier immediately prior to dispatching the driver.” If the storm was in the forecast when you dispatched, you can’t plan around those extra 2 hours. This exception is a safety valve, not a scheduling tool.

The Dispatcher’s HOS Checklist

Run this before you accept any load:

1. Confirm the reset. Has the driver had 10 consecutive hours off? When does their next window start?
2. Check the weekly clock. Is the carrier on 60/7 or 70/8? How many on-duty hours does the driver have left?
3. Estimate all on-duty time, not just driving. Add realistic loading, unloading and detention at both ends.
4. Fit the drive inside the 11 and the 14. Whichever runs out first is your real limit.
5. Place the 30-minute break. Know where it happens before driving passes 8 hours.
6. Decide on sleeper berth or a 34-hour restart if the trip can’t fit a single duty day or the weekly clock is short.
7. Ignore the adverse-conditions exception when planning. If you know about the weather, it doesn’t apply.
8. Quote the honest delivery time. If the clocks don’t work, renegotiate or reassign. Never push.

What’s Changing, and What Isn’t

You’ll hear talk about pilot programs. In September 2025, FMCSA announced the Split Duty Period pilot program (Federal Register document 2025-17938), which would let participating drivers pause the 14-hour window with a break “of no less than 30 minutes and no more than 3 hours.” On October 6, 2026, FMCSA published an information-collection notice (2026-20476) for the Split Duty Period pilot, with about 256 drivers taking part and comments due by December 7, 2026. On October 7, 2026, a separate notice (2026-20524) covered the Flexible Sleeper Berth pilot, also with about 256 drivers and comments due by December 7, 2026.

Neither pilot is in effect. They don’t change the rules you dispatch under today. Plan to the current regulations, period.

Records Back Up Your Plan

Motor carriers must keep records of duty status for at least 6 months from the date of receipt (49 CFR 395.8(k)(1)), and drivers must keep a copy of each record for the previous 7 consecutive days (49 CFR 395.8(k)(2)). Those logs are your source of truth when you check clocks, and they’re the first thing anyone pulls when a delivery goes sideways.

The best dispatchers aren’t the ones who say yes the fastest. They’re the ones whose yes actually means something, because every promise was checked against the 11, the 14 and the 60/70 before it left their mouth. Drivers trust them, customers rebook with them, and nobody ends up explaining a bad log to an auditor. If you’ve made the move from the cab to the command desk, you already know how these clocks feel from behind the wheel. Plan like you still have to drive the load yourself, and you’ll never promise a delivery your driver can’t legally make.