Speed and Distance Verification

Test and validate speed measurement equipment including odometers, speed loops and speed cameras.

  • Accurate and traceable results
  • Synchronised HD video and data
  • 2 cm position accuracy with RTK
  • IMU integration for enhanced accuracy in areas with poor GPS

Testing and Validation of Speed Measurement Equipment


When prosecuting speeding offences, evidence must be presented that cannot be challenged: the accuracy of the device used to capture speed at the time of the offence has to be accurate.

Highly Accurate

The VBOX 3i RTK provides a positional accuracy of less than 2 cm as well as speed accuracy of 0.1 km/h.

Video Integration

VBOX video data loggers can be used for synchronised HD video and data analysis.

IMU Integration

The VBOX Inertial Measurement enhances the accuracy of your data in areas with poor GPS.

Testing Equipment


Speed and distance verification can be conducted using any VBOX data logger, performance meter or video data logger. Our flagship data logger, the VBOX 3i RTK, offers the highest accuracy for speed, position and heading data when connected to an RTK Base Station or NTRIP service.

Measured Parameters (VBOX 3i RTK)

  • Vehicle speed (0.1 km/h RMS)
  • Vehicle heading (0.1° RMS)
  • Position (V: 10 mm; H: 5 mm RMS)

Cm-Level Position Accuracy with RTK

Using RTK correctional data from an RTK Base Station or NTRIP solution provides positional accuracy that's within centimetre level.

Video Integration

VBOX Video data loggers offer synchronised video and data, with real-time graphical overlay. We offer a range of systems that are available with either four (SD) or two (HD) cameras, that can be mounted inside or outside the vehicle. The graphical overlay is totally user-configurable and can be easily altered to present relevant information according to the tests being conducted.

IMU Integration

A VBOX Inertial Measurement Unit (IMU) can be used alongside the VBOX 3i data logger to enhance the accuracy of your data in areas with poor GPS, including tunnels. IMU integration helps to combat satellite drop-out for up to 10 seconds without lock.

Case Study


The accuracy of the VBOX 3i means it can be used as a reliable reference in speed tests, as well as for validating the accuracy of speed measurement equipment.

Road Safety Support is a not-for-profit organisation that works with the majority of police forces in the UK and Wales, as well as forces in Asia and Oceania. The VBOX 3i helped Road Safety Support achieve ISO 17025 accreditation, as it offers a reliable and traceable method for testing and calibrating speed measurement devices.

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