Taximeters

A taximeter is a device installed in taxicabs to calculate fares based on distance traveled and time elapsed. It displays the current fare to passengers and, in many cases, prints a receipt at trip end.

Operation is based on wheel signals or GPS data to measure distance, plus a timer for waiting time. A flag-fall starts the fare, then rates are applied per kilometer or per minute, with possible surcharges and tolls. Modern meters may integrate with dispatch systems and payment terminals.

Design and types: Early meters were mechanical; most contemporary devices are electronic or digital and may include multiple tariffs, night or airport surcharges, and currency switching. They are built with tamper seals and log data to support auditing and prevent fraud.

Regulation: Local authorities typically license and calibrate meters, conduct periodic inspections, and seal devices to prevent tampering. In some jurisdictions, meters must be certified before use and after repairs.

In practice: Taximeters are standard in taxis worldwide, though some markets rely on fixed rates or app-based fare calculation. Advances in GPS and mobile payments have driven digital meters and remote monitoring by operators.

History: The concept emerged in the late 19th century and became common in major cities in the 20th. The shift from mechanical to electronic meters accelerated in the late 20th century with GPS integration.