Digital tachographs

The digital tachograph is an electronic system installed on commercial vehicles (lorries, coaches and heavy goods lorries) that records the driving and rest times of drivers and traces detailed data on the speed and distances travelled in order to improve work conditions, road safety and fairer competition.

How is it made?

The digital tachograph is composed of two essential components for its use:

  • A vehicle unit - a device similar to a car radio or a CD player which includes two smart-card readers, a manual input selector, a data display screen and a small printer>
  • a smart-card or a tachograph card

Data checking

When connected securely to the vehicle sensors, the digital tachograph records in its memory the data relating to the vehicle’s use for a period of one year. The device detects the identity of the driver or drivers, the driving and rest times, the driving modes(individually or in a team).

Other functions

The device also records:

  • The vehicle’s identification data (life)
  • The distance travelled.
  • The operating faults and malfunctions (for one year).
  • The speed held in the last 24 hours of vehicle use.