JSTE Journal of Traffic Engineering
Online ISSN : 2187-2929
ISSN-L : 2187-2929
Special Edition A (Research Paper)
Fundamental Study for Adaptation Requirements of ACC (Adaptive Cruise Control) to Winter Road Environment
Shuhei WADASho TAKAHASHINaoyuki SHIRAISHIKazunori MUNEHIROMinoru OKADAToshiyuki NAITOToru HAGIWARA
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2021 Volume 7 Issue 2 Pages A_289-A_297

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Abstract

In the present study, objective is to reveal the driver's subjective risk perception when closing to a preceding vehicle in car-following situation under snowy or dry/wet road conditions. It was assumed that the driver uses the ACC to follow a preceding vehicle, and the preceding vehicle decelerated and approached. The results of the field experiment shown that the driver's subjective risk perception to the preceding vehicle was increased by ACC use. The models for estimating the driver's subjective risk perception to the preceding vehicle based on values of the 1/TTC and the 1/THW in the situation of preceding vehicle deceleration were delivered in each type of road conditions (Risk Feeling equation). From the Risk Feeling equation, the THW of the ACC, which corresponds to the conventional driving of the driver's subjective risk perception to the preceding vehicle, is shown in each road conditions. It was suggested that longer value of the THW is required to reduce driver's risk feeling when driving with ACC on snowy roads.

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© 2021 Japan Society of Traffic Engineers
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