1. Over steering and Stability-> Abrupt Lane Change Maneuver or VDA Test.
This test consists in simulating the avoidance of a sudden obstacle at a constant speed of 60km/h without braking. During the avoidance maneuver, there is a period of instability which occurs when entering the left lane . At this moment, a brutal mass transfer occurs that makes the rear end of the car slide (over steering).
This slide or over steering can be measured as a drift angle of the actual path the vehicle followed compared to the ideal path it should follow to ensure optimal safety and stability.