Lateral Jerk (LatJ)

Description

Please refer to the longitudinal jerk.

Properties

Run-time capability

Yes

Target values

0.1 g/s (curve safety) [Ambros2019], 0.5 g/s [UNECE79], other upper bounds exist [ISO11270] [ISO22179]

Subject type

Road vehicles (automated and human)

Scenario type

Any involving a rapid steering maneuver, e.g. curve driving, evasion maneuver

Inputs

Jerk \(j_i\) at time t

Output scale

\((-\infty,\infty)\), jerk (g/s or m/s³), ratio scale

Reliability

High, as jerk outcome is often in accordance with a change in criticality [Bagdadi2013]

Validity

Low for run-time applications, as jerk makes criticality only measurable on reaction, but high for a-posteriori analysis under the assumption of drivers being reacting to critical events [Bagdadi2013]

Sensitivity

High, since critical situations either require the driver to react abruptly, or the jerk will be high during the collision itself

Specificity

Low, as critical situations can happen without lateral acceleration of the actors

Prediction model

None, since instantaneous