To detect harsh or risky driving behavior, Mentor leverages readings from the built-in accelerometer, combined with acceleration changes. Mentor’s “Harsh Cornering” thresholds are based on industry best practice and field testing done by eDrivingSM. These thresholds are subject to change based on user experience, industry standards, and in-house research.
The “Harsh Cornering” threshold is set at 0.5 g-force. The larger the turning radius, the higher the speed tolerance. For example, a driver making a turn above 20 mph / 32 km/h on a two-lane intersection with a 55-foot / 17-meter turning radius would cause a “Harsh Cornering” event to be recorded. On a three-lane intersection with an 82-foot / 25-meter turning radius, “Harsh Cornering” would be triggered at a turning speed above 25 mph / 40 km/h.