Definition

Noun: A device that automatically records the speed and distance traveled by a vehicle, along with the driver's activity periods (driving, rest, breaks), producing a graphical or digital record. It is primarily used for monitoring and ensuring compliance with regulations on drivers' working hours.

Usage

The word "tachograph" is used to refer to the specific recording instrument installed in vehicles like trucks, buses, and coaches. * The law requires all commercial vehicles to be fitted with a calibrated tachograph. * Transport officials checked the driver's tachograph chart for any violations of driving time rules. * The digital tachograph stores data on a smart card.

Advanced Usage

• "Tachograph record" or "tachograph chart": Refers to the physical disc or digital data file produced by the device, which serves as a legal document.
  • The company archives all drivers' tachograph records for two years as required by law.
• In regulatory and logistics contexts, "tachograph" is central to discussions about Hours of Service (HOS) compliance and fleet management.

Variants and Related Words

• Tachometry (n): The measurement of speed or rotation.
• Tachogram (n): The actual graphical record produced by a tachograph.
  • The analyst examined the tachogram for signs of excessive speed.

Synonyms

• Recording tachometer: A more technical descriptive term.
• Driver's hour recorder: A functional term describing its purpose.

Related Phrases

• "To analyze the tachograph": To examine the recorded data.
  • After the incident, the first step was to analyze the vehicle's tachograph.
• "Tachograph infringement": A breach of driving regulations identified from tachograph data.
  • The audit revealed several tachograph infringements within the fleet.

Noun

1. a tachometer that produces a graphical record of its readings; used to record the speed and duration of trips in a motor vehicle