Definition

Noun: A graphical record or chart showing speed and distance over time, produced by a tachograph (a device used in vehicles).

Usage

A tachogram is a specific type of data log or chart. It is used to analyze the operational history of a vehicle, particularly for regulatory compliance, fleet management, or accident investigation.

Examples

• The police examined the truck's tachogram to verify the driver's hours of service.
• Fleet managers review tachograms regularly to monitor driver behavior and fuel efficiency.
• The tachogram clearly showed periods of excessive speed followed by sudden braking.

Advanced Usage

• Digital tachogram: Refers to data stored electronically in modern tachograph units, as opposed to the older paper disc charts.
  • The digital tachogram provided a more detailed analysis of the journey.

Variants and Related Words

• Tachograph (n): The device that produces the tachogram.
  • The tachograph is a mandatory piece of equipment in commercial vehicles.
• Tachometry (n): The measurement of speed or rotation.

Synonyms

• Speed-distance chart
• Tachograph record
• Driver log (in a specific, technical context)

Notes

This is a highly specialized technical term primarily used in the transport, logistics, and law enforcement sectors. It is not commonly used in everyday conversation.

Noun

1. a graphical record of speed and distance produced by a tachograph