What are the braking and acceleration events?

The app calculates the vehicle's acceleration from the GPS speed measurement. Two levels of detection characterize accelerations or decelerations: the "high" level and the "abrupt" level.

Each time the value of the acceleration (or deceleration) exceeds a threshold, an event is recorded. Its position and intensity are recorded and displayed on the map.

For acceleration, the thresholds are as follows: 

• the strong level threshold: 2.0m/s^2,
• the rough level threshold: 2.5m/s^2.

For braking, the thresholds are as follows: 

• the high level threshold: -1.8m/s^2,
• the rough level threshold: -2.4m/s^2.

For loss of adhesion, the thresholds are as follows: 

• the high level threshold: 2.0m/s^2,
• the rough level threshold: 2.3m/s^2.