Standard Measures

General Description

A list of standard measures related to driving research.

Driver Behavior
Braking onset time
Accelerator onset time
Number of collisions or incidents
Time to take evasive / protective action (e.g., activate brake, activate accelerator, turn the steering wheel)

Performance Measures
Time to Line Crossing(TLC)
Mean speed
Standard deviation of speed
Speed drops during task
Throttle variance
Throttle power spectrum (holds)
Lane departures
Standard deviation of lane position
headway distance or time
Headway variance
Coherence measures
Time-to-collision
Standard deviation of steering wheel angle
Steering entropy
Steering power spectral distribution & related measures

Physiological Data
Eye behaviors

• Horizontal and vertical variability
• Absolute position
• Driver scan and search patterns
• Eye glances to mirrors

Heart rate
ECG

Vehicle Behavior Measures
Lane position
Lane crossings
Steering angle deviation
Lateral deviation around lane center
Vehicle path profiles
Vehicle velocity profile

Other
Coherency
Gain
Phase angle

References

Cross References

Fisher, D. (2005). Scientific and Technical Advances: Problems and Opportunities
Mourant, R. (2005). Driving Simulator Performance Variables: An Overview
van Winsum, W. (2005). Measuring Event-Based Driver Performance: Implications for driving simulator scenarios
Caird, J. (2004). If Criticism is the Mother of Methodology, Who Created Driving Simulation"
Green, P. (2004). Selection of Variables- includes a list of what measures to report in a publication
Roetting, M. (2005). Eye Movement Analyses

DriveSafety Data Collection Variable Definitions