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Operational Definitions of Driving Performance Measures and Statistics
- Ground Vehicle Standard
- J2944_201506
- Issued
Downloadable datasets available
Annotation ability available
Sector:
Issuing Committee:
Language:
English
Scope
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).
Rationale
A common and consistently defined vocabulary is a basic requirement for comparing evaluation procedures and their results for driving contexts, vehicles, and vehicle components. This is the reason for foundational documents such as SAE J1100 Motor Vehicle Dimensions (Society of Automotive Engineers, 2009) and related mobility documents (Steinfeld, Fong, Kaber, Lewis, Scholtz, and Goodrich, 2006). (See also National Research Council, 2011.) As shown by Savino (2009) and Green (2012), many terms used to describe driving performance are not consistently named, defined (if they are defined at all), or used in the automotive engineering and research literature. This inconsistency makes comparing studies, test procedures, and results difficult, which in turn can compromise safety and usability. To overcome the inconsistency problem, this document provides standard names and definitions of driving performance measures and statistics, as well as supporting information to encourage their use.
Recommended Content
| Ground Vehicle Standard | Lane Departure Warning Systems: Information for the Human Interface |
| Ground Vehicle Standard | Blind Spot Monitoring System (BSMS): Operating Characteristics and User Interface |
Topic
Data Sets - Support Documents
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| Table 1 | Response time measures classification scheme | |
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| Table 2 | “Average spacing” (distance gap) between vehicles for highways | |
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| Table 3 | Quantities related to required deceleration | |
| Table 4 | Variable definitions for required deceleration | |
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| Table 5 | Example spectral analysis output from data of one subject | |
| Table 6 | Standard deviation of steering wheel angle (deg) | |
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| Table 7 | Steering entropy for various tasks for 4 subjects | |
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| Table 8 | Lane departure start options | |
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| Table 9 | TLC values for impaired driving | |
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| Table 10 | Lane change statistics reported in the literature | |
| Table 11 | Lane changes times for heavy trucks | |
| Table 12 | Lane change severity rating | |
| Table 13 | Lane change urgency rating scale | |
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Issuing Committee
Driver Metrics, Performance, Behaviors and States Committee
This technical committee is responsible for all safety and human factors issues that impact the driver metrics (e.g., navigation and route guidance and calculations, driver visual behavior using video-based techniques, operational definitions of driving performance measures, evaluation approaches and metrics, and driver fatigue and drowsiness states, etc.).
Reference
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