Telematics data is everything a tracked vehicle reports about itself: where it is, how it is moving, what the engine is doing, and which of your rules it has just broken. Fleets rarely suffer from having too little of it. They suffer from having six categories of it and a routine built around only one, which is why so many tracking systems get described as a map that nobody looks at.
This guide covers what each category contains, what it is genuinely good for, and what to do with the parts that are not worth your attention.
The six categories
| Category | Examples | Decision it supports |
|---|---|---|
| Location | Current position, route line, stop points | Dispatch, customer questions, recovery after theft |
| Journey | Start and end times, distance, duration, stop length | Billing, timesheets, delivery disputes |
| Behaviour | Speeding, harsh braking, acceleration, cornering | Coaching, insurance conversations, accident risk |
| Engine and usage | Ignition, engine hours, idle time, fault codes | Maintenance scheduling, fuel waste, replacement timing |
| Exceptions | Geofence events, out-of-hours movement, tamper alerts | Immediate response while it still matters |
| Derived | Driver scores, utilisation, cost per kilometre | Management decisions and reporting upward |
Notice that the categories get more useful as they get further from the raw signal. Location is the most detailed and the least decisive. Derived data is the most processed and the most likely to change what somebody does on Monday.
Which data changes decisions
Idle time is the fastest win
Idle time is engine-on, vehicle-stationary time. It is easy to measure, easy to explain to a driver, and mostly habit rather than necessity, which is why it moves faster than almost anything else you can attack. It also has a direct fuel cost attached, so the argument for changing it makes itself. The detail sits in reducing vehicle idling.
Behaviour data works only when it is shared
A driver score kept in the office changes nothing. The same score shown to the driver changes a surprising amount, because most people adjust once they know a number exists and is being looked at. The data has to be fair to survive that conversation, which is why event thresholds and device quality matter as much as the reporting.
Engine hours beat the calendar
Service intervals based on dates treat a van doing constant city drops the same as one doing weekly motorway runs. Engine hours and real distance describe how hard each asset has actually worked, which is the basis of the approach in fleet maintenance management.
Exceptions are the only data that needs to be live
Everything else can be reviewed weekly. Exceptions cannot, because their value expires: a geofence breach or an out-of-hours movement is worth acting on within minutes and worth almost nothing in a monthly report.
The part nobody warns you about
The common failure is not missing data. It is alert fatigue. A fleet switches on every available notification, receives hundreds a week, and stops reading them by the second week. From then on the system is technically working and practically ignored.
The fix is unglamorous:
- Turn on the smallest set of alerts that would make someone act immediately. For most fleets that is out-of-hours movement, tamper and geofence breach.
- Give every alert an owner and a response. An alert nobody is expected to act on should be a report line instead.
- Review the alert list monthly and delete anything that has never produced an action.
- Move everything else to a weekly summary, where volume is fine because nobody is expected to respond in the moment.
How long to keep it
Retention is worth deciding deliberately, because telematics data has two very different jobs. Operational use is short-lived, usually days. Evidential use is long, and it is the one that catches fleets out: an insurance claim, a customer dispute or a staff grievance can arrive months after the journey and is unanswerable without the history.
- Live and recent detail: days to weeks, at full resolution.
- Journey and event history: months, because disputes are slow.
- Summaries and scores: years, since they are small and make trends visible.
Keeping detailed data forever is not automatically the safer choice. Data about employees carries obligations, and holding more of it for longer than you have a reason to is a risk in itself, which is covered in employee vehicle tracking and privacy.
Who should see what
Telematics data is not one audience. A dispatcher needs the live map and nothing else. A fleet manager needs behaviour and exceptions. Finance needs distance, fuel and cost per kilometre, and has no use for the map at all. A customer, if you expose anything to them, needs the arrival time for their own delivery and nothing more.
Setting this up as roles rather than one shared login is what stops the system feeling overwhelming, and it is also what keeps sensitive data away from people who have no business reason to see it.
Frequently asked questions
What is telematics data?
It is the record a tracked vehicle produces about itself, covering location, journeys, driving behaviour, engine and usage, rule breaches, and the scores and totals calculated from all of those.
What is telematics data used for?
Mainly four things: reducing fuel and idle waste, coaching drivers and lowering accident risk, proving service times to customers, and scheduling maintenance on real usage rather than on a calendar.
How long should telematics data be kept?
Detailed data for weeks, journey and event history for months, and summarised scores and totals for years. The history matters because insurance claims and customer disputes often arrive long after the journey they concern.
Is telematics data accurate enough to act on?
For operational decisions, yes. Position is accurate to a few metres in open conditions, and engine and motion data comes from the vehicle itself. Small differences between tracked distance and an odometer reading are normal and do not indicate a fault.
Who owns telematics data from company vehicles?
The business operating the vehicles holds the data, but data about identifiable drivers carries obligations regardless of ownership. A written policy stating what is collected, why, and who can see it is the practical answer, and it is also what keeps drivers cooperative.
Turn the data into a routine
Data that nobody reviews is a cost rather than an asset. Get a Fleetile demo and see how the Fleetile platform puts each category in front of the person who can act on it.
