During thorough testing over 70 days of ordinary traffic, covering almost 1.5 million passing vehicles, the TrafSense road monitoring system generated only 0.28 false alarms per km of road per 24 hours. This reduces the risk of road operators being flooded with false alarms and helps them stay prepared to respond quickly to real incidents that may threaten health and safety. The Norwegian Public Roads Administration (NPRA) requires fewer than 1 false alarm per km of road per 24 hours.
Stopped vehicle: TrafSense standard deviation between reported and actual position is 6 m. Wrong-way vehicle: the standard deviation is 10 m. These results demonstrate precise localisation of detected incidents. The Norwegian Public Roads Administration (NPRA) has less stringent requirements for the positional accuracy of these incident types, requiring only that the relevant camera zone, typically 60–70 m long, is identified.
Stopped vehicle: TrafSense Mean Time to Detect (MTTD) is 11 seconds. Wrong-way vehicle: TrafSense MTTD is 3 seconds. Both values are well below the Norwegian Public Roads Administration’s (NPRA) requirement of less than 20 seconds.
TrafSense provides playback functionality that allows road operators to identify the positions of stopped vehicles for first responders. This can be critical when smoke or fire limits the visibility of video cameras and makes it difficult to locate vehicles. The Norwegian Public Roads Administration (NPRA) has verified the TrafSense playback functionality in a closed tunnel filled with artificial smoke.
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