A tachograph is a device fitted to a vehicle that records information about the driver’s activities, including driving time, speed, and distance. Tachographs are used to ensure that drivers and employers comply with the rules on drivers’ hours.

The rules on drivers’ hours are designed to protect drivers’ health and safety. They require drivers to take breaks at regular intervals to avoid fatigue. Fatigue can lead to accidents, so the rules are an important safety measure.