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A METHODOLOGY TO EVALUATE DRIVER ACCEPTANCE

A METHODOLOGY TO EVALUATE DRIVER ACCEPTANCE. Transportation Research Board Annual Meeting January 15, 2002 Mary Stearns Wassim Najm Linda Boyle Volpe National Transportation Systems Center. Evaluation Goals for Intelligent Vehicle Initiative (IVI) Crash Avoidance Systems (CAS).

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A METHODOLOGY TO EVALUATE DRIVER ACCEPTANCE

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  1. A METHODOLOGY TO EVALUATE DRIVER ACCEPTANCE Transportation Research Board Annual Meeting January 15, 2002 Mary Stearns Wassim Najm Linda Boyle Volpe National Transportation Systems Center

  2. Evaluation Goals forIntelligent Vehicle Initiative (IVI)Crash Avoidance Systems (CAS) Understand safety benefits Determine driver acceptance Characterize performance and capability Assess deployment potential and price Address institutional and legal issues • Determine driver acceptance

  3. IVI • …Designing a technology to fit the perception, cognition, and behavior of the entire citizenry, in a safety critical function • …Drivers are provided with additional in-vehicle information, which might, unless carefully designed, compromise…safety and efficiency • Human factors conditions become a dominant consideration in design and development IVI Business Plans, 1997,2000 

  4. Driver Acceptance depends on: • The degree to which drivers can use products successfully • Perceived usefulness to the driver • Potential for market acceptance, considering usability and product cost   NHTSA Strategic Plan 1997

  5. Driver Acceptance Methodology • Objectives express driver acceptance elements • Sub-objectives specify objectives • Measures to rate each sub-objective • pre- and post-Field Operational Test (FOT) surveys • FOT vehicle data, video clips • focus groups • controlled experimentation

  6. Driver Acceptance Objectives • Ease of use • Ease of learning • Adaptation • Desirability – perceived value • Affordability (Advocacy)

  7. Measures - Ease of Use • Ready Usability • “How hard was it to use CAS controls?” • What was the Incidence of erroneous activation of controls? • Support of individual variability • Awareness of CAS state, operational thresholds • Perceived demands on driver • CAS use patterns • Discriminability of alerts • Reaction to false/nuisance alarms

  8. Measures - Ease of Learning • Time to learn • Utility of instructions, training • Ability to retain knowledge of use • “Did you feel you could easily recall CAS operation?”

  9. Measures - Adaptation • Allocation of control inputs, in-vehicle activities • Visual accommodation • “Drivers Opinion of ability to judge location of distant vehicles/objects” • Alertness • Travel patterns • Behavioral adaptation

  10. Measures - Desirability • Perception of safety • “Willingness to drive in adverse conditions” • Driving skill enhancement • Measures of vehicle control; i.e., road position error • Seamless system integration • Reduced workload

  11. Measures - Affordability/Advocacy • Willingness to endorse CAS • “Willing to recommend CAS use to family/friends?” • Interest in purchasing CAS • Amount willing to pay • Acceptance of CAS in rental vehicle

  12. Successful adoption of IVI CAS Technologies and attainment of anticipated benefits requires that:There is a comprehensive understanding of driver acceptance issues

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