ISC is a TCA certified service which utilises the Global Navigation Satellite System (GNSS) to independently monitor the speed of a heavy vehicle.

Through ISC, speed is continuously measured and is calculated on a rolling average.

Recognised by government and delivered as part of the National Telematics Framework, ISC meets regulatory benchmarks for reliability, accuracy, policy intent and tamper evidence.

ISC can be used by regulators to obtain assurance that heavy vehicles are not exceeding a set speed threshold, and/or to detect faulty speed limiter devices.

All IAP Service Providers offer ISC.