Tachograph: what is it?

A tachograph is a device designed to control a driver and a vehicle. The device provides a permanent fixation of such data as the distance traveled by the car, travel time, the speed with which the vehicle is moving, as well as the time of parking or stopping the car.

Below is written about the types, purpose of the tachograph and the installation rules.

Purpose of the tachograph

The reason for the appearance of the tachograph was primarily the need to ensure the safety of road users. The device allows the driver to control so that he does not violate the speed limit, as a result of which an accident may occur.

In the event of a disputed situation on the road, an accident or other incidents, it is easier to prove the driver’s innocence or, conversely, it is easier to blame if there is a tachograph on the dashboard.

The device allows you to monitor and control the entire schedule of the driver, as well as the time of his rest.

Tachograph installation rules

The tachograph must be installed on the following cars:

  • trucks carrying dangerous goods from 3.5 to 12 tons and more than 12 tons;
  • buses in excess of eight seats weighing up to 5 tons;
  • trucks that carry out international transport over 50 kilometers from the place of departure;
  • trucks weighing more than 15 tons, not carrying dangerous goods;
  • trucks with a permitted maximum weight of 12 to 15 tons, not carrying out long-distance transport;
  • from April 2015, trucks carrying any cargo from 3.5 to 12 tons.

Thus, in the near future, for example, it will be necessary to equip the car with a tachograph in order to operate, for example, a taxi driver on a minibus engaged in long-distance transportation. On other nuances that need to be taken into account when dealing with passenger traffic, read our article How to get a license for a taxi.

Types of tachographs

There are two types of tachographs: digital and analog. Analogue tachograph externally is of two types: round, similar to the speedometer of a car, and rectangular, resembling the size of the car radio. The fundamental difference between analog and digital devices lies in the method of recording and storing information.

In the analogue tachograph, the information on the movement of the vehicle is recorded on a special pie chart in which the driver specifies the date of the trip. The reading is carried out using special sensors.

Due to the fact that analog devices are gradually becoming obsolete, it makes sense to elaborate on tachographs of the digital type. They have the ability to communicate with the global positioning system, which allows you to more accurately control the location of the car, and also equipped with a special cryptographic module that provides the highest reliability of the recorded data.

How does the digital tachograph


SKZI - is a means of cryptographic protection of information, in other words, it is a special module that collects data on the vehicle operation, regardless of whether or not the device has electricity.

SKZI are a small unit with an output for the antenna, allowing you to connect it to the GLONASS system. The main purpose of the device is to protect data from correction.

Data access

The device interface is designed to identify individuals with different levels of access to information. The work is carried out with the help of special cards with chips, which are divided into:

  • master card, used by a specialist to install and configure equipment;
  • enterprise card providing access to the extended data stored by the device;
  • controller card, with the help of which employees of the responsible authorities, including the traffic police, get the current readings;
  • driver card used to identify the person driving the car.

Of course, the access level is indicated in descending order, as the ability to read data decreases. As a result, the digital tachograph makes it possible to most effectively control the movement of transport carrying out international and long-distance transport.