Investigating the Impact of Visual Pollution on Wayfinding in Large Shopping Centers
Introduction
Wayfinding is a cognitive-behavioral process through which users acquire environmental information, make spatial decisions, and move toward a destination. In complex shopping environments, it is shaped by spatial configuration, visual accessibility, environmental cues, and users’ prior knowledge. Lynch’s concept of environmental imageability and later architectural wayfinding studies emphasize the importance of legible paths, nodes, landmarks, and coherent circulation systems in supporting orientation (Lynch, 1960; Passini, 1981, 1984; Weisman, 1981). Complex floor plans, poorly differentiated routes, limited visual access, and ineffective signage can increase disorientation and route errors (O’Neill, 1991; Dogu & Erkip, 2000).
Visual pollution refers to the dense, disorganized, incompatible, or competing presence of visual elements that reduces perceptual coherence and the quality of environmental information. In commercial interiors, it may arise from excessive advertising, competing commercial and directional information, uncontrolled variation in color and materials, glare, dense storefront displays, moving screens, and the absence of a clear visual hierarchy (Portella, 2016; Gao et al., 2024). Although wayfinding and visual pollution have each been studied, empirical research at their intersection remains limited. This study investigates how visual pollution affects wayfinding in a large shopping center and how it influences spatial knowledge, examined through landmark knowledge, route knowledge, and survey knowledge (Siegel & White, 1975; Golledge, 1999).
Methodology
The study adopted an exploratory qualitative design and was conducted in a large commercial center in the Tajrish district of Tehran. The case has seven above-ground floors and one basement level, receives approximately 18,000–20,000 visitors per day, and was selected because of its dense spatial structure, complex circulation, diverse commercial signage, and evident wayfinding challenges. Data were collected through literature review, direct field observation, interviews, behavioral mapping, movement tracking, and route-recall interviews.
The field study was implemented in three stages. First, 10 purposively selected stakeholders—four vendors, five shoppers, and the complex designer—participated in in-depth interviews to identify recurring wayfinding difficulties and visually disruptive conditions. Interview data were analyzed through open, axial, and selective coding and compared with field observations. Second, seven actual users (five men and two women, aged 28–34), including both familiar and unfamiliar users, participated in a behavioral field study. Their movements, pauses, backtracking, and decisions were recorded on architectural floor plans during two navigation tasks: one with a specified destination and another involving a product-category search without a predetermined destination. Third, participants retraced their routes and were interviewed at predefined stations about memorable environmental features, decision points, route structure, and spatial recall. Observational, behavioral, and interview data were triangulated to compare actual movement with verbalized spatial representations.
Results and Discussion
The findings show that visual pollution influences wayfinding through interacting conditions at macro, meso, and micro spatial scales. At the macro scale, irregular internal geometry, inconsistent functional zoning, complex circulation, deep secondary paths, multiple openings, and interruptions to visual continuity made the overall configuration difficult to comprehend. These conditions particularly constrained survey knowledge by weakening users’ understanding of broader relationships among zones, routes, and destinations.
At the meso scale, insufficient differentiation between main and secondary routes was recurrent. Similar corridor widths, uniform lighting, numerous decision nodes, and accumulated visual information at intersections reduced route hierarchy and increased hesitation. Movement tracking showed that users tended to select wider, more visually accessible routes, while deep secondary paths and visually overloaded nodes were associated with route changes, pauses, and uncertainty. These observations indicate that visual organization affects the acquisition and use of route knowledge.
At the micro scale, directional signs, shopfronts, advertisements, lighting, furniture, elevators, stairs, and escalators functioned as potential landmarks. When repetitive, densely clustered, visually competing, or poorly positioned, however, their distinctiveness decreased. Return-route interviews showed that participants relied primarily on landmark-related information when reconstructing their journeys, whereas references to route width, route depth, or functional zoning were less evident. Landmark knowledge therefore emerged as the most frequently used form of spatial knowledge while also being particularly vulnerable to visual clutter. Excessive signage, inconsistent storefronts, conflicting lighting, and competing stimuli reduced landmark salience and were associated with longer decision periods, repeated pauses, backtracking, and route errors. These patterns suggest increased perceptual demands rather than a direct measurement of cognitive load.
The findings support a multi-scale interpretation of visual pollution. Visual disorder is not limited to advertising or decorative clutter; it can also result from incoherent zoning and circulation at the macro scale, weak route hierarchy at the meso scale, and competing signs and landmarks at the micro scale. Macro, meso, and micro conditions should therefore be understood as spatial scales that interact with, rather than correspond directly to, the three forms of spatial knowledge.
Conclusion
Visual pollution can impair wayfinding by reducing environmental legibility and interfering with the acquisition, recognition, and retrieval of spatial information. In the studied shopping center, irregular zoning and circulation reduced comprehension of the overall configuration; weak route differentiation complicated route choice; and dense, repetitive, or competing landmarks reduced the clarity of environmental cues. Effective wayfinding design should address visual clarity across multiple scales: coherent zoning and functional organization at the macro scale; clear circulation hierarchy and route differentiation at the meso scale; and coordinated signage, lighting, storefronts, surfaces, and landmark placement at the micro scale.
Controlling redundant visual elements, strengthening the hierarchy of environmental information, and improving the salience and continuity of meaningful landmarks may facilitate navigation and improve users’ spatial experience. Because the research is based on a single case study, a small purposive sample, cross-sectional data collection, and field observations constrained under crowded conditions, the findings should be interpreted as exploratory rather than broadly generalizable. Future research should test the framework in other shopping centers, architectural typologies, and urban settings using larger samples and complementary quantitative or experimental measures.