DOT hours of service rules cap how long a commercial driver may drive and work. A property-carrying driver may drive up to 11 hours inside a 14-hour on-duty window that starts after 10 consecutive hours off duty, may not drive after 8 cumulative driving hours without a 30-minute interruption, and is limited to 60 hours in 7 days or 70 hours in 8, under the property-carrier limits in 49 CFR 395.3.
Jobsite waiting is what makes those limits awkward to dispatch against. A ready-mix driver waiting at the placement area while the crew resolves pump access preserves the 11-hour driving allowance and burns the 14-hour window anyway. A dump-truck driver can spend hours cycling between quarry, yard, and site, and a heavy-haul operator can lose a permitted route mid-shift, each delay moving a different clock.
Several exceptions change the calculation and aren't interchangeable, since eligibility depends on the vehicle, cargo, route, and whether the movement is interstate. What follows covers the federal limits, the heavy-fleet exceptions, state rules, a calculator worksheet, and the records to retain. Electronic logging device compliance covers the recording half of the same obligation.
What DOT Hours of Service Rules Require
DOT classifies duty time in four ways on an HOS record: off duty, sleeper berth, driving, and on duty not driving. The limits interact, so having driving hours left does not by itself mean a driver may legally continue. Six limits run at once, which is why fleets that keep the four duty states in one place can answer a dispatch question that fleets checking four systems cannot.
Limit | Requirement | What it does not do |
|---|---|---|
10 consecutive hours off duty | Required before driving; starts a new daily calculation | Does not reset the weekly cycle |
11-hour driving limit | Maximum driving after qualifying rest | Not reduced by loading, inspections, or waiting |
14-hour on-duty window | Driving must end 14 consecutive hours after coming on duty | Not paused by ordinary off-duty time mid-shift |
30-minute interruption | Required after 8 cumulative driving hours | Need not be off duty; on-duty-not-driving counts |
60/70-hour cycle | 60 hours in 7 days, or 70 in 8 if operating daily | Counts all on-duty time, not only driving |
34-hour restart | Optional reset of the weekly calculation | Does not affect daily limits |
How the 14-Hour Window Works
The 14-hour clock begins when the driver comes on duty following 10 consecutive hours off, and ordinary off-duty time during the shift does not pause it. Once the window expires, the driver may keep performing non-driving work but may not drive a commercial motor vehicle (CMV) until taking another qualifying off-duty period.
A driver reporting at 5:00 a.m. generally cannot drive after 7:00 p.m., even if much of that shift was spent waiting at an active site, and running past the 14-hour mark creates no extra time to get back to the yard.
What Counts as the 30-Minute Interruption
Off-duty, sleeper-berth, and on-duty-not-driving time all count toward the required interruption, alone or combined. Because waiting at a jobsite is on-duty-not-driving time, it satisfies the break for any property-carrying driver who does not drive during it, which matters more to a heavy fleet than to a long-haul carrier. The separate ready-mix provision below is narrower relief for one vehicle class and does not imply that other vehicles are excluded from this general rule.
Weekly Cycles and the Optional Restart
Driving and other on-duty work both count toward the 60-hour or 70-hour cycle, so a week heavy on loading and light on driving can still close it.
Under 49 CFR 395.3(c), a period of 7 or 8 consecutive days may end with an off-duty period of 34 or more consecutive hours. The regulation permits that break rather than requiring it, so a fleet can instead manage the rolling total and let older hours fall out of the calculation.
Construction-Fleet HOS Exceptions
Five exceptions matter to heavy fleets, and applying one exception code across every construction vehicle is how fleet and safety teams end up explaining an out-of-service order. Each has its own eligibility test.
The 150-Air-Mile Short-Haul Exception
Under 49 CFR 395.1(e)(1), a qualifying property-carrying driver operates within a 150-air-mile radius of the normal work reporting location, returns to that location and is released within 14 consecutive hours, receives at least 10 consecutive hours off between duty periods, and stays within the applicable driving and weekly limits.
Qualifying drivers use carrier time records instead of records of duty status (RODS) or an ELD, and the 30-minute break requirement does not apply to them under the carve-out in 395.3(a)(3)(ii). The carrier still retains report time, release time, total daily on-duty hours, and required prior-period information for six months. Exceeding the radius or release-time boundary can cost the exception for that day, so check the route and expected release time before assigning a late delivery.
The 24-Hour Construction-Materials Restart
Drivers primarily transporting construction materials and equipment to or from an active construction site may end a 7-day or 8-day period with 24 or more consecutive hours off duty, under 49 CFR 395.1(m), rather than the standard 34. The construction-materials definition in 395.2 sets the eligibility boundary at a 75-air-mile radius of the normal work reporting location, though a state may set a lower radius of between 50 and 75 air miles on notice to the Administrator.
The provision covers dump trucks hauling aggregate, fill, pavement materials, or equipment during active construction. It does not cover placarded hazardous material, and it changes only the weekly restart: the 11-hour, 14-hour, and break rules still apply unless another exception applies.
Ready-Mix Jobsite Waiting
A driver of a qualifying rotating-drum concrete delivery vehicle may use 30 minutes or more of waiting time at a job site or terminal to satisfy the 30-minute break, provided no other work is performed during it. The FAST Act final rule granted that relief and remains the governing authority for the provision.
It applies specifically to rotating-drum vehicles. Other vehicles in the same position do not get this provision, and they do not need it, because their waiting time already counts as on-duty, not-driving time under the general rule above.
Utility-Service Vehicles
Drivers of qualifying utility-service vehicles are exempt from Part 395 while repairing, maintaining, or operating facilities needed to deliver electricity, gas, water, sewer, telephone, cable, broadband, or cellular service. It does not extend to new utility construction merely because the finished asset will provide a utility service, so maintenance and restoration work is classified separately from new installation.
Permitted Oversize and Overweight Loads
FMCSA has renewed a specialized-carrier exemption that relieves qualifying drivers of oversize or overweight loads requiring a government-issued permit from the 30-minute rest break entirely. It does not affect daily or weekly driving limits, and eligibility depends on the permit and the load, not the carrier. Confirm the exemption's current terms and expiry before configuring a heavy-haul movement against it.
Adverse Conditions, Sleeper Berths, and Crew Buses
Three situations take a local fleet outside its routine pattern, and none of them should be dispatched like a normal short-haul day.
Adverse Driving Conditions
Unexpected conditions meeting the regulatory definition may extend both the driving limit and the 14-hour window by up to 2 hours under 49 CFR 395.1(b)(1). Predictable rush-hour traffic, routine seasonal weather, and any delay known before dispatch are outside it, and drivers relying on the exception must annotate the record.
Split Sleeper-Berth Periods
A property-carrying driver may pair qualifying rest periods of at least 7 consecutive hours in the sleeper berth with another of at least 2 consecutive hours, provided the two total at least 10 hours. The current standard options are 7/3 and 8/2 splits, and when properly paired, neither qualifying period counts against the 14-hour window.
There is no federal "6 and 9 hour rule." The phrase usually reflects confusion with the current splits or with pilot-program combinations that are not generally available. Most local fleets never use sleeper berths, though the rule matters for specialized equipment moves and longer interstate assignments.
Passenger-Carrying Construction Vehicles
A CMV carrying a crew may be a passenger-carrying vehicle rather than a property carrier, which changes the limits to an 8-hour off-duty requirement, a 10-hour driving limit, a 15-hour on-duty limit, and the same 60/70-hour cycles under the passenger-carrier limits in 395.5. The 30-minute break and 34-hour restart are property-carrier rules and do not apply. Whether a crew bus falls inside that category turns on seating capacity and whether passengers are carried for compensation, per the CMV definition in 49 CFR 390.5.
Federal and State HOS Rules
Interstate status gets determined before any state limit is applied. A truck can stay inside one state and remain in interstate commerce where the shipment's essential character reflects a fixed interstate movement, which is why the commerce determination, governing jurisdiction, vehicle class, and exception used are worth documenting. State limits also change on their own schedule, so regulatory change monitoring belongs to whoever owns the dispatch rules.
State intrastate limits can differ materially. Florida's intrastate rules permit qualifying CMV operators working solely in intrastate commerce, and not transporting placarded hazardous material, to drive up to 12 hours following 10 consecutive hours off duty and to stop driving after the 16th hour on duty.
The weekly figures are 70 hours in 7 consecutive days or 80 in 8, and that pair applies only where the carrier operates every day of the week. Florida's daily provision also excludes drivers of utility service vehicles. None of it displaces federal rules once the movement is interstate.
DOT Hours-of-Service Calculator Worksheet
A calculator earns its place when a driver nears a daily or weekly limit and dispatch needs the earliest binding constraint rather than four separate numbers. Any missing input is itself a review trigger.
Inputs to Collect
Governing rule set: Federal property carrier, passenger carrier, or the applicable intrastate rule.
Last qualifying rest: When the driver went off duty, and whether the full consecutive period was completed.
Current shift start: The moment the 14-hour window began.
Driving and break history: Cumulative driving since the qualifying rest, plus hours accrued since the last 30-minute interruption.
Rolling-cycle hours: On-duty hours in the applicable 7-day or 8-day cycle, and any sleeper-berth periods where splits are used.
Claimed exception: Radius, return time, cargo, vehicle type, and the annotation behind it.
Outputs to Calculate
Those inputs produce four constraints: remaining driving time, time left in the on-duty window, time until an interruption is required, and remaining weekly on-duty capacity. The lowest of the four is the earliest binding limit, and dispatch needs that single number. Where an input is missing, the result gets flagged for review rather than acted on.
A calculator is a planning aid and not a record. Short-haul time-record rules, RODS requirements, and ELD certification rules determine what a fleet must keep, and a compliance manager's interpretation of an exception overrides any calculated output.
Records to Retain for an Audit
Under the RODS requirements in 395.8 and the supporting-document rules in 395.11, carriers generally retain RODS and supporting records for at least six months, and short-haul carriers retain their required time records for the same period. Running that file monthly, rather than on request, keeps an inspection request from becoming a reconstruction project, and Datagrid's Audit Agent can validate it against a defined checklist.
Six things belong in that file. The duty records themselves come first, such as RODS or qualifying short-haul time records. Then the operational evidence that corroborates them: dispatch records, trip records, schedules, and bills of lading, plus expense receipts and mobile communication records used to verify on-duty time. The ELD layer adds edits, annotations, certifications, and unassigned-driving explanations, along with a separate backup copy of ELD records held on a separate device. Last, exception documentation showing why the driver, vehicle, cargo, and route qualified.
An inspector reviewing duty records will usually pull the driver's license status in the same pass, so CDL and violation monitoring belongs on the same monthly cycle.
Common Violations, ELD Edits, and Certification
HOS violations were the leading driver out-of-service category in the Commercial Vehicle Safety Alliance's 2025 International Roadcheck results, at 1,076 violations or 32.4 percent of driver out-of-service violations, with false logs fourth at 332 violations or 10.0 percent. Inspectors may place a driver out of service for operating past the 14-hour window, and that driver cannot resume CMV driving until completing qualifying rest.
Recurring failures beyond the limits are recordkeeping failures: a false duty-status record, an out-of-date RODS, the wrong recording method, and uncertified ELD information. Under the ELD certification rules in 395.30, drivers certify their own records, and a carrier-proposed edit needs the driver's confirmation plus recertification. A proposed correction never erases the original.
Malfunction Response
Under the malfunction procedures in 395.34, a driver notifies the carrier in writing within 24 hours and reconstructs the required records, and the carrier has 8 days from discovery or notification to correct the malfunction. Those two deadlines are why a written malfunction workflow beats an informal instruction to use paper until it is fixed.
Review HOS Procedures With Datagrid's Agentic AI
Datagrid's SOP Agent and Audit Agent cover the documentation side of hours-of-service compliance, so the safety and compliance team spends its time on exception decisions rather than on assembling the file:
Procedure gap review: Examine the written dispatch and HOS workflow against the applicable federal and state requirements, and flag steps that are missing, ambiguous, or inconsistent with the exception the fleet actually claims.
Exception documentation checks: Verify that each claimed exception carries the facts behind it, including radius, release time, cargo type, vehicle classification, and the required annotation.
Retention file validation: Check the six-month file for missing RODS, absent supporting records, uncertified ELD information, and unexplained unassigned driving.
Malfunction workflow tracking: Confirm that each reported ELD malfunction has a written driver notification, reconstructed records, and a correction inside the 8-day window.
Exemption expiry tracking: Flag a workflow built around a time-limited exemption before that exemption lapses.
Dispatch decisions, exception eligibility, and every duty-status determination stay with the compliance manager and the driver.
Get started with Datagrid, then pick the exception your fleet claims most often and check whether last month's records actually evidence it.
Frequently Asked Questions About DOT Hours of Service
What Is the 11-Hour Rule for DOT Hours of Service?
Eleven hours is the driving ceiling for a single duty period, available once the driver has taken the required 10 hours off. The catch is that it sits inside a shorter clock: the 14-hour window closes whether the driver has used those 11 hours or not.
Does Jobsite Waiting Time Count Against Hours of Service?
Yes and no, and the distinction matters at dispatch. Waiting is on-duty time, so it eats the 14-hour window while leaving the 11-hour driving allowance untouched. It also counts toward the 30-minute interruption for any property-carrying driver who does no driving during it, which is a rule about duty status rather than about vehicle type.
Is There a 6 and 9 Hour Sleeper-Berth Rule?
No such federal rule exists. Drivers asking about it are usually thinking of one of the two splits that do exist, or of a combination trialed in a pilot program and never made generally available.
How Long Must a Fleet Keep Hours-of-Service Records?
Six months, covering the duty records themselves, the supporting documents listed in 49 CFR 395.11, and the backup ELD copy that has to live on separate hardware.
