A tachograph is a device used in vehicles, particularly in commercial transport, to record driving time, speed, and distance traveled. It helps ensure that drivers comply with regulations regarding working hours and rest periods, promoting road safety and fair competition in the transport industry. There are two main types of tachographs: analog and digital. The analog tachograph uses a paper disc to record data, while the digital version stores information electronically. Both types are essential for monitoring driver behavior and ensuring that transportation companies adhere to legal requirements.