Hours of Service and
Duty Logging
An ELD-style hours of service system that records drive and rest time automatically, holds duty-status logs that cannot be quietly edited, and gives drivers and managers a clear view of remaining hours. The full duty-logging chain, from the engine-connected logger to the driver app and compliance reports.
THE CHALLENGEDuty Logs Only Mean Something If They Cannot Be Quietly Changed
Driver hours rules exist because a tired driver is a danger, but a paper logbook or an editable spreadsheet is trivial to fudge after the fact. The point of an electronic duty logger is that the record is captured from the vehicle itself, tied to engine and motion data, and protected so that an edit leaves a trace. The hard part is recording drive and rest status accurately, keeping the log tamper-resistant, working when the cab has no signal, and presenting it so a driver knows their remaining hours and a manager can prove compliance. This hours of service system is built around that integrity requirement.
Part of the Telematics and GPS Tracking stack, and commonly built alongside Fleet Management Systems.
WHAT'S INCLUDED
From Engine-Connected Logger to Compliance Report
Engine-Connected Logger
A logging device connects to the vehicle over OBD-II or J1939 and derives drive status from engine-on and motion data, so driving time is recorded automatically rather than depending on the driver to remember to switch status.
Duty-Status Engine
A duty-status state machine covers driving, on-duty not driving, off-duty, and rest, applying your jurisdiction's rules for drive limits, mandatory breaks, and daily and weekly caps.
Tamper-Resistant Log Store
Log records are hashed and chained so the duty history is tamper-evident. An edit cannot silently rewrite the past, and any correction is recorded as an annotation with the original entry preserved, exactly what an audit needs.
Driver App
A driver app shows current duty status, hours driven, time until the next required break, and remaining hours for the day and week, with simple status changes and required certifications at the end of a shift.
Fleet Compliance Dashboard
A manager view flags drivers approaching or breaching limits, surfaces unassigned driving time, and gives a fleet-wide picture of who is compliant and who needs attention before a violation occurs.
Compliance Reports and Export
Duty logs and summaries are generated in the formats an inspection or audit expects, exportable per driver and per period, so producing evidence of compliance is a routine action rather than a scramble.
HOW IT WORKS
From Engine Data to Verified Log
The log has to be both automatic and trustworthy. The flow is designed so the record builds itself from vehicle data and stays defensible afterwards.
Capture from the Vehicle
The logger reads engine-on and motion data over OBD-II or J1939 and sets drive status automatically, so driving time is recorded from the vehicle rather than entered by hand.
Apply Rules and Protect
The duty-status engine applies drive limits and break rules in real time, and each record is hashed and chained so the history is tamper-evident from the moment it is written.
Sync, Show and Report
Logs buffer offline and sync over MQTT when signal returns. The driver sees remaining hours live, and managers get compliance dashboards and export-ready reports.
WHAT YOU GET
Compliance Drivers and Managers Can Rely On
No More Forgotten Entries
Drive time is captured from the engine, so a driver cannot simply forget to log a shift, and the most common source of a broken logbook disappears.
Logs That Hold Up
Tamper-evident records mean the duty history stands up to an audit or an investigation, because any correction is annotated and the original is preserved.
See a Violation Coming
Drivers see remaining hours and time to the next break live, and managers get warned before a limit is breached, so violations are prevented rather than discovered later.
Audit Without the Scramble
Export-ready logs and summaries per driver and period mean producing evidence for an inspection is a routine action, not a frantic search through records.
ENGINEERING AND PLATFORM
Built for Reliability and Audit
Vehicle Bus Integration
Engine and motion data is read over OBD-II and J1939, deriving drive status from the vehicle itself so the record reflects what actually happened on the road.
Offline-First Logging
Logs are written and protected on the device, buffered through dead zones, and synced over MQTT with TLS when connectivity returns, so no duty time is ever lost.
Configurable Rule Sets
The drive limits, break rules, and daily and weekly caps are configurable, so the same platform adapts as regulations differ by region or change over time.
FAQ
Common Questions
How does the system record driving time automatically?
The logger connects to the vehicle over OBD-II or J1939 and derives drive status from engine-on and motion data. When the vehicle is moving under power, driving time is recorded automatically. This removes the most common failure of paper logs, where a driver simply forgets to switch their status.
What makes the duty logs tamper-resistant?
Each log record is hashed and chained to the previous one, so the history is tamper-evident. An edit cannot silently rewrite the past, and any correction is stored as an annotation with the original entry preserved. That is exactly the integrity an audit or investigation needs to trust the record.
What duty statuses does the system track?
A duty-status engine covers driving, on-duty not driving, off-duty, and rest, and applies the drive limits, mandatory breaks, and daily and weekly caps for your jurisdiction. The driver can change status where allowed, and certain transitions are derived automatically from the vehicle data.
What happens when the cab has no signal?
Logging is offline-first. Records are written and protected on the device, buffered through dead zones, and synced to the backend over MQTT with TLS when connectivity returns. No duty time is lost, and the local record remains the source of truth until it is uploaded.
Can drivers see their remaining hours?
Yes. The driver app shows current duty status, hours driven, time until the next required break, and remaining hours for the day and week. This lets a driver plan a route around their available hours rather than discovering a violation after the fact.
Can the rules be adapted to different regions?
Yes. The drive limits, break rules, and daily and weekly caps are configurable, so the same platform adapts as hours regulations differ by region or change over time, without rebuilding the logging engine for each ruleset.
Does this run alongside existing fleet telematics?
Yes. The hours of service logger uses the same vehicle bus connection and cloud platform as the tracking and fleet management layer, so duty logs sit alongside location, trips, and vehicle health on one backend rather than as a separate compliance silo.
Ready to Build Your Hours of Service System?
Share your fleet, the duty rules you operate under, and how your drivers work today to get a tailored approach covering the logger, the duty-status engine, and the compliance reporting.
Schedule a Free Consultation