During thorough testing over 70 days of ordinary traffic, accumulating almost 1.5 million passing vehicles, the Trafsense road monitoring system generated only 0.28 false alarms per km road per 24 hours. This eliminates the danger of road operators being flooded with false alarms, and helps the operators being better prepared to respond to real incidents that may require very swift response in order to minimise the damage to health and safety. The Norwegian Public Roads Administration (NPRA) requires < 1 false alarm per km road per 24 hours.
Stopped vehicle: Trafsense standard deviation of reported position vs real position: 6 m. Wrong-way vehicle: Trafsense standard deviation of reported position vs real position: 10 m. The Norwegian Public Roads Administration (NPRA) has much less stringent requirements for the position accuracy of these incident types, specifying only that the relevant camera zone (typically 60-70 m long) needs to be identified.
Stopped vehicle: Trafsense Mean Time to Detect (MTTD) is 11 seconds. Wrong-way vehicle: Trafsense MTTD is 3 seconds. Both MTTDs are only a fraction of the Norwegian Public Roads Administration's (NPRA) requirement of < 20 seconds.
Trafsense offers a playback functionality to the road operator for identifying the positions of stopped vehicles to first responders. This may be critical information to help minimise damage to health and safety. Video cameras operating within the visible spectrum will very quickly be blinded by smoke and not able to provide such information. The Norwegian Public Roads Administration (NPRA) has verified the Trafsense playback functionaliy in a closed tunnel filled with artificial smoke.
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