CMT uses phone sensor data to detect 5 driving behaviors that you can avoid to lower the risk of a car crash. Some behaviors may occasionally be used to maintain safety on the road. You can use your driving insights from CMT to identify patterns in these behaviors, and adopt safe driving habits going forward.
Hard braking
Hard braking happens when you reduce your speed suddenly, such as slamming on the brakes in a lower-speed zone or drastically reducing speed on the highway. Hard braking is sometimes necessary to prevent collisions, but frequent hard braking indicates driving too fast or too close to the car in front of you. The hard braking threshold is -3.2 m/s2 longitudinal acceleration for at least 0.6 seconds.
Harsh accelerating
Harsh accelerating events are triggered when your car rapidly speeds up in a short distance. While accelerating to switch lanes is sometimes necessary, doing this frequently can lead to a crash. The harsh accelerating threshold is +3.0 m/s2 longitudinal acceleration for at least 0.6 seconds.
Phone handling
Phone handling events are detected when the phone is held while it is unlocked and the car is in motion (traveling at least 9 mph). This can include motions such as picking up the phone to text, make a call, or look at an app. If your phone is mounted, hands-free calls, tapping, or swiping are not considered events.
Sharp turning
Sharp turning is when your car makes tight and abrupt changes in direction, indicating there wasn’t enough time or space to make a safe turn. The sharp turning threshold is +/- 4.2 m/s2 lateral acceleration for at least 0.6 seconds.
Speeding
Speeding events occur when your vehicle exceeds posted speed limits by a threshold of 9 mph or more for at least 5 seconds. The threshold increases to 12 mph when the posted speed limit is 55 mph or higher. Speeding can also lead to sharp turning and hard braking.
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