Telematics
The integrated use of telecommunications and informatics to transmit vehicle location, engine data, driver behavior, and operational metrics over cellular networks to a central platform, forming the data foundation of modern fleet management.
Rajat Gupta runs FleetOpsClub and writes its software reviews, comparisons and pricing pages. Every tool on the site is assessed against the vendor's own published documentation and pricing, and each pricing figure carries the date it was last verified so readers can judge how current it is. Where a vendor does not publish a price, the page says so rather than estimating one.
Last reviewed Oct 15, 2026Compare gps fleet tracking platforms on verified pricing and deployment detail before you shortlist: every gps fleet tracking platform we have reviewed.
What telematics measures
| Interface | Vehicle Type | Data Available | Installation |
|---|---|---|---|
| OBD-II port | Light vehicles (cars, vans, pickup trucks) | Location, basic fault codes, fuel level, odometer | Plug-and-play, no wiring |
| J1939 CAN bus | Class 4–8 trucks, buses, construction equipment | Full engine data, transmission, axle load, fuel consumption | Hardwired, professional install |
| J1708 / J1587 | Older heavy vehicles (pre-2000) | Limited engine data, basic fault codes | Hardwired, professional install |
| OEM embedded | New vehicles with factory telematics (Ford Pro, GM Fleet) | Full OEM data, no aftermarket device needed | Factory-installed |
| Asset tracker (GPS-only) | Trailers, equipment, non-powered assets | Location and motion only, no engine data | Battery-powered, magnetic mount |
How Telematics Data Reaches the Platform
Real-World Example: Telematics ROI in a 120-Vehicle Service Fleet
- Match the device interface to your vehicle types, OBD-II for light vehicles, J1939 for heavy trucks
- Confirm cellular network coverage in your operating region, some rural operators need satellite-capable devices
- Verify the telematics vendor supports your specific vehicle makes and models for engine data (coverage varies significantly)
- Check data update frequency and whether higher-frequency options are available at additional cost
- Confirm historical data retention period, some vendors purge data after 12 months, limiting long-term trend analysis
- Ask whether the platform supports mixed-fleet configurations (telematics devices + OEM embedded data sources)
- Evaluate driver privacy features. Can location tracking be suspended during off-duty personal use?
- Verify API access is included in your contract, not sold as a separate add-on
Heavy Vehicle Telematics: J1939 vs. OBD-II
Terms like this one decide what a vendor is really quoting for, so it is worth checking the fleet software profiles that document how each platform handles it, and modelling the cost with a fleet cost calculator before a vendor call.
Telematics FAQ
Quick answers to the questions buyers usually ask once the category, software, or rollout details start getting more specific.
For light commercial vehicles (vans, pickup trucks, SUVs), OBD-II plug-in devices provide adequate data and are simple to self-install. For medium and heavy-duty vehicles (Class 4–8 trucks), hardwired J1939 connections are required to access meaningful engine and powertrain data. Hardwired installations also eliminate the risk of the device being unplugged and are required for FMCSA-compliant ELD applications.
FMCSA-mandated ELDs (Electronic Logging Devices) for commercial drivers subject to HOS regulations must be registered with FMCSA and meet specific technical specifications. Many telematics platforms include ELD functionality as a combined offering, but not all telematics devices meet ELD requirements. If HOS compliance is required, verify the platform is on FMCSA's registered ELD list at eld.fmcsa.dot.gov before purchasing.
Active telematics transmits data in real time over a cellular network. This is the standard for modern fleet management, enabling live tracking, real-time alerts, and immediate dispatch visibility. Passive telematics stores data on the device and downloads it when the vehicle returns to a base station or is physically connected. Passive systems are significantly cheaper but provide no real-time visibility, making them suitable only for low-value asset tracking where real-time data is unnecessary.
Telematics covers any vehicle data pulled off the engine bus and paired with position. A fleet already collects most of it: hours-of-service duty status recorded by an ELD, engine fault codes and odometer readings broadcast over the SAE J1939 databus, engine hours logged to a tenth of an hour, and latitude/longitude fixes. The FMCSA ELD specification requires exactly this set, power status, motion status, miles driven and engine hours, read directly from the engine ECM (49 CFR Part 395, Appendix A to Subpart B, sections 4.2 and 4.3.1).
No. GPS supplies one input: position. Telematics also reads the engine. Under the FMCSA ELD specification, a device fitted to a model-year-2000-or-later truck with an ECM must establish a link to that ECM over serial or CAN and take power status, motion status, miles and engine hours from it, with position handled as a separate channel accurate to within half a mile. A GPS-only tracker cannot produce engine hours or fault codes at all (49 CFR Part 395, Appendix A, sections 4.2(b) and 4.3.1.6(c)).