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The Journal of The Korea Institute of Intelligent Transport Systems Vol.24 No.6 pp.212-229
자율주행차 혼재 환경을 고려한 전용차로 및 Flex Zone 설계요소 선호 분석
Road Infrastructure Preferences for Dedicated Lanes and Flex Zones in Mixed Traffic
Abstract
As autonomous vehicles require differentiated infrastructure designs from conventional roads, this study identified the key design elements of autonomous vehicle dedicated lanes and multi-purpose service spaces (Flex Zones), and analyzed the user preferences for these elements through a conjoint analysis. The results showed that, for dedicated lanes, users preferred guidance line markings, door signs, soft safety fences, LCS operational information, and the absence of access and exit separation, which support vehicle mobility. In contrast, for Flex Zones, the users preferred full-lane coloring, letter signs, curb fences, VMS operational information, and all zone lighting, which enhance user accessibility and stopping safety. These differences indicated that dedicated lanes function as continuous-flow driving spaces where maintaining traffic flow is critical. By contrast, Flex Zones serve as intermittent-use stopping spaces centered on accessibility and dwell activities. These findings can serve as foundational data for determining the relative importance of facility elements that must be considered when designing autonomous driving infrastructure.
