A harsh acceleration can include a sudden lane change or cornering. A harsh deceleration is hard
braking and can take place with or without turning and with or without changing lanes.
Acceleration is measured parallel or lateral to vehicle travel in feet per second squared (ft/s2
). An
in-cab unit installed prior to Stage 3 displayed green (steady or blinking) and yellow and red
events in the vehicle (see Section 2.1.5). The driving performance actions monitored include