Eco-driving and telematics: saving fuel without overstepping

Why eco-driving has become strategic

Road transport carries significant weight in Europe's carbon footprint. According to the Council of the EU, heavy-duty vehicles account for more than 25% of CO2 emissions from road transport in the European Union — a sector already under regulatory pressure with ambitious reduction targets adopted in 2024. For carriers, acting on fuel consumption is both an immediate economic lever and a response to growing sustainability requirements.

Embedded telematics — sensors, geolocation, driver behaviour analysis — is the reference tool for achieving these objectives. According to market analyses (GMInsights), fleet management systems deliver fuel reductions of around 10 to 30% through route optimisation, idle reduction, and driver behaviour monitoring. These ranges vary widely depending on the starting point and the quality of monitoring implemented.

The most fuel-hungry driving behaviours

• Harsh acceleration: every aggressive start consumes a disproportionate amount of fuel compared to progressive acceleration.
• Late braking: braking late means having accelerated too long. Anticipation is the key.
• Excessive engine speed: driving outside optimal RPM ranges mechanically increases consumption.
• Idling: a diesel engine running at idle for an hour consumes a meaningful amount of fuel. Across a fleet, cumulative waiting times often represent a significant saving opportunity.
• Excessive speed: aerodynamic drag increases with the square of speed — driving at 90 km/h instead of 80 raises consumption noticeably.

The legal framework: inform, do not individually assess without consent

Deploying a telematics system involves collecting named geolocation and driving behaviour data. The CNIL (France's data protection authority, whose guidelines serve as a sector reference) precisely regulates these practices to protect employees' rights.

Key obligations according to the CNIL:

• Prior information: employees must be informed of the existence of the geolocation system, its purposes, and their rights before any deployment.
• Deactivation outside working hours: the employee must be able to deactivate location tracking outside working hours, even if the vehicle is a company car.
• No individual assessment without consent: the CNIL recommends not evaluating individual driver performance on the basis of geolocation data without their explicit consent. Driving behaviour data can be used for training or collective assessments, but not for unconsented individual sanctions.
• Retention periods: geolocation data are retained for two months in principle, up to one year for route optimisation, and up to five years for working time monitoring.

Eco-driving and GDPR: a collective-objectives approach

Best practice is to orient the eco-driving programme towards collective and non-punitive objectives:

• Share aggregated indicators by route or vehicle (without driver identification in shared reports).
• Organise training sessions based on the most frequent behaviours at fleet level.
• Involve drivers in setting objectives — a co-designed programme achieves better buy-in.
• Provide individual feedback only within a confidential review, with the employee's agreement.

What dropfleet contributes in this context

dropfleet does not offer an embedded telematics module (vehicle sensors). However, the platform contributes to eco-driving indirectly and compliantly: by optimising routes, it reduces kilometres driven, journey times, and therefore the overall fuel consumption of the fleet. Drivers receive already-optimised routes on their app, without needing to make routing decisions on the road — which also reduces stress and promotes calmer driving.

Criteria for choosing a telematics solution

• Verify that the solution is GDPR-compliant and natively handles retention periods and employee access rights.
• Favour solutions that separate aggregated (fleet) and individual (driver) data in their reporting interfaces.
• Involve employee representatives upstream if your headcount exceeds the statutory thresholds for mandatory consultation.

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