Effects of Winter Road Surface on Driver's Risk Avoidance Behavior When the Vehicles Are Entering a Curve Operated with Adaptive Cruise Control

In winter, to drive a vehicle has a lot of difficulties due to road slipperiness, low visibility and narrowed road by lying snow. Understanding the driving environment where the driver feels danger is necessary to introduce SAE Level 2 or 3 in winter, so the present study aims to clarify driver’s risk avoidance behavior when the drivers are using adaptive cruise control (ACC) under the winter road conditions. In an experiment on the public road, a total of 6 participants drove the test vehicle with ACC-ON conditions on the expressway and several local highways. The authors measured the driver’s risk avoidance behavior when the vehicles are entering a curve. Also, the authors simultaneously measured road slipperiness, road geometry, and weather condition. Results indicated that road slipperiness, road geometry, and the vehicle speed have a significant effect on the occurring driver’s risk avoidance behavior entering the curve. Slippery road, hard geometry, and high-speed driving often lead the driver’s risk avoidance behavior. According to these results, it is suggested that the driver’s risk avoidance behavior can reduce if the driving support system slows down before the vehicle approach such a slippery or hard geometry condition road. Also, it is clarified that driver’s risk avoidance behavior was reduced on the expressway which the road geometry design was high level even if the road surface conditions were slippery.


  • English

Media Info

  • Media Type: Web
  • Features: Figures; References; Tables;
  • Pagination: 15p

Subject/Index Terms

Filing Info

  • Accession Number: 01763582
  • Record Type: Publication
  • Report/Paper Numbers: TRBAM-21-02321
  • Files: TRIS, TRB, ATRI
  • Created Date: Dec 23 2020 11:06AM