SAE J2944_201506

1. SCOPE
2. REFERENCES
3. CITING J2944 DEFINITIONS
4. INTRODUCTION
5. GENERAL MEASUREMENT AND REPORTING GUIDANCE
    AND REQUIREMENTS
6. GENERAL DEFINITIONS
7. LONGITUDINAL CONTROL: OPERATIONAL DEFINITIONS
    FOR DRIVER'S PEDAL RESPONSES
8. LONGITUDINAL CONTROL: OPERATIONAL DEFINITIONS
    OF VEHICLE-BASED MEASURES
9. LATERAL CONTROL: OPERATIONAL DEFINITIONS FOR
    DRIVER STEERING RESPONSES TO EVENTS
10. LATERAL CONTROL: OPERATIONAL DEFINITIONS OF
    VEHICLE-BASED MEASUREMENTS
11. NOTES
APPENDIX A - CALCULATION OF TIME TO COLLISION (TTC)
APPENDIX B - CALCULATION OF MINIMUM TIME TO
             COLLISION (TTC[MIN])
APPENDIX C - CALCULATION OF MINIMUM ADJUSTED TIME
             TO COLLISION
APPENDIX D - CALCULATION OF TIME EXPOSED TIME TO
             COLLISION (TETTC OR TET)
APPENDIX E - CALCULATION OF TIME INTEGRATED
             TIME-TO-COLLISION (TITTC OR TIT)
APPENDIX F - CALCULATION OF STEERING WHEEL REVERSALS
APPENDIX G - CALCULATION OF STEERING ENTROPY
APPENDIX H - CALCULATION OF TIME TO LINE CROSSING,
             TRIGONOMETRIC METHOD
APPENDIX I - CALCULATION OF MINIMUM TIME TO LINE
             CROSSING - APPROXIMATE METHOD FOR FIELD DATA

This Recommended Practice, Operational Definitions of Driving Performance Measures and Statistics, provides functional definitions of and guidance for performance measures and statistics concerned with driving on roadways.

This Recommended Practice, Operational Definitions of Driving Performance Measures and Statistics, provides functional definitions of and guidance for performance measures and statistics concerned with driving on roadways. As a consequence, measurements and statistics will be calculated and reported in a consistent manner in SAE and ISO standards, journal articles proceedings papers, technical reports, and presentations so that the procedures and results can be more readily compared. Only measures and statistics pertaining to driver/vehicle responses that affect the lateral and longitudinal positioning of a road vehicle are currently provided in this document. Measures and statistics covering other aspects of driving performance may be included in future editions. For eye glance-related measures and statistics, see SAE J2396 (Society of Automotive Engineers, 2007) and ISO 15007-1 (International Standards Organization, 2002).