A Study on Behavior-Inducing Design Using Lines : Focusing on the Characteristics and Cases of Circular Lines and Color-Guided Lines as a Non-Directive Induction Strategy

This study explores the role of lines as non-directive design tools in public spaces. Instead of enforcing behavior through commands or prohibitions, non-directive design uses subtle visual cues to encourage voluntary user response. Three guiding principles—consideration, information, and autonomy—are proposed as alternatives to control-based strategies. Through case studies of circular distancing markers at Domino Park (New York) and colored directional lines on Korean expressways, the study demonstrates how linear elements influence perception and guide behavior without physical barriers. The findings show that lines function as intuitive affordances, enabling users to navigate and respond within shared spaces. The research suggests a shift from directive control to empathetic visual communication in public design, emphasizing clarity, consistency, and contextual sensitivity.