The One-Minute Rule: Legal Optimization

2026 Forensic Guide: How to legally gain up to 45 minutes of daily driving time using the digital tachograph rounding algorithm.

What is technically the Tachograph One-Minute Rule?

Introduced by Regulation (EU) No. 1266/2009, the one-minute rule stipulates that the tachograph will only record a full minute as "driving" if it is the predominant activity during those 60 seconds. If within a calendar minute you drive for 29 seconds and rest for 31, the tachograph logs "rest" for that entire minute. This algorithmic logic is vital for delivery operations, port queues, or service area movements, where constant stops often "burn" driving hours artificially.

Chapter 1: The Predominance Algorithm

Prior to 2011, any vehicle movement (even for 1 second) triggered a full minute of driving time. Under current regulations, the system analyzes the 60-second block:

  • Case A: Drive 28 seconds + Stop 32 seconds = The minute counts as REST.
  • Case B: Drive 31 seconds + Stop 29 seconds = The minute counts as DRIVING.

In urban routes or heavy traffic, applying this technique with precision can result in up to 45 extra minutes of availability by the end of the working day.

Warning for Older Tachographs

This rule only applies to digital tachographs manufactured after October 2011 (VDO version 1.4 onwards). If you operate an older vehicle, this rule does not apply, and every second of movement will deduct a full minute of driving time.

To maximize this legal advantage without committing infringements, professional drivers use the following protocols:

  1. Queue Movements: If the vehicle moves meter by meter, try to keep the movement under 29 seconds and come to a complete stop for more than 30 seconds. The tachograph will continue to log rest.
  2. Loading Dock Manouvers: When approaching a dock, if the calendar minute has just started, you have nearly half a minute to maneuver without breaking the "Other Work" or "Rest" record.

Chapter 3: Is this legal during an Inspection?

Absolutely YES. This is not tampering; it is the official software logic approved by the European Union. However, an excess of micro-movements recorded as rest may raise suspicions of "driving without a card" if there is no consistency with the odometer readings. Therefore, it is vital to audit the .DDD file to ensure that distance jumps are consistent with the recorded activity.

One-Minute Rule FAQ

Yes. The rounding algorithm is maintained in the new smart models. In fact, GNSS precision helps validate that these short movements occur in loading zones or traffic jams, providing greater legal backup during an audit.

Technically, if the movement lasts less than 29 seconds and the tachograph logs "rest," the pause is not digitally interrupted. However, **we advise against this practice** during mandatory rest periods, as an inspector may consider the driver is not in a state of "free disposal" if they are moving the truck.

TachoTools Analysis: Operational Efficiency

Many fleet managers lose thousands of euros annually because their drivers "exhaust" their driving hours in 10-meter maneuvers. In 2026, training on the one-minute rule is your most profitable investment.

Our Recommendation: Analyze your files with TachoTools to quantify how much driving time you are "giving away" to the system. Our software detects optimization potential and allows you to instruct your fleet on efficient compliance.

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Quick Fact

A driver who masters the one-minute rule can gain nearly a full extra week of driving time per year.

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