Multi-criteria analysis based layer dedicated to estimation of road quality based on Standard Deviatiation of Acceleration (m/s²). The standard deviation is the average amount of variability in the dataset. It tells you, on average, how far each value lies from the mean. A high standard deviation means that values are generally far from the mean, while a low standard deviation indicates that values are clustered close to the mean. For stable driving on a road without potholes, we expect a low module of the standard deviation (e.g. high values can be interpreted as an area with poor quality of the road surface).