Effect of Speed Adjustment Delineator on Driver's Risk Avoiding Behavior with the Merging Vehicle While Level 2 Automated Driving

This study proposed speed adjustment delineators embedded in the center of the travel lane as a preliminary speed adjustment device for drivers who is operating a semi-automated vehicle, which is equivalent to a level 2 SAE vehicle, to reduce conflicts with the merging vehicles on the expressway. The authors conducted travel experiments using a driving simulator with 46 participants, and the results of driving records, subjective evaluations, and questionnaires showed that the information provided about speed adjustment delineators affected the driver’s avoidance behavior. The participants who were explained the intention of the speed adjustment delineators adjusted the speed earlier by turning off the ACC at the merging section. This avoids conflicts with the merging vehicles and reduces the subjective risk. In addition, the acceleration or deceleration behaviors to the merging vehicle were clarified.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Photos; References; Tables;
  • Pagination: 20p

Subject/Index Terms

Filing Info

  • Accession Number: 01764201
  • Record Type: Publication
  • Report/Paper Numbers: TRBAM-21-01141
  • Files: TRIS, TRB, ATRI
  • Created Date: Dec 23 2020 11:22AM