Global Navigation Satellite System (GNSS) Metering Association for Road User Charging (GMAR) has just released a partial first draft framework for performance measurement of GNSS road use metering systems, setting quantitative and testable performance metrics, which may be used to test and compare GNSS metering products and services. This partial draft includes: Charging Integrity and Charging Availability. The authors assert that these performance requirements are particularly critical for defending evidentiaryweight, and potentially legal admissibility. GMAR is an independent industry body, proposing a framework that will support comparisons whether between vendors and test locations or over time for a particular vendor. It leaves setting of fixed performance standards to the buyer.
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