Analog tachographs, installed in vehicles registered before April 30, 2006, use sheets (so-called speedometer plates) to record data. Digital tachographs of the first generation (G1), mandatory since 1/5/2006, have gone through three versions until 14/6/2019, following technical changes and improvements, such as improved movement readings. The second generation of digital tachographs (G2), introduced on June 15, 2019, includes intelligent devices that use the ITS interface, are connected to the satellite navigation system and provide data for remote inquiries. DTCO 4.1, the second version of the smart tachograph from 21.8.2023, brings further improvements, including automatic border crossing recognition. These devices set new standards in accuracy and functionality, making them essential for modern fleet monitoring.