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2026 Galleries // 2026 Spark: Spring Student // O.DI

O.DI

Winner - Silver

Competition: Spark: Spring Student
Designer: Hyojin Park
Design Type:
Company / Organization / School: Hannam University
Team Members: PARKHYOJIN, KIMGEONWOO, KIMSEONGGYEOM, KIMHYEJIN, JEONGSOYOON, JEONGBYEOL, JOCHANHYEONG, CHOIYOUNGJAE

1. Introduction and Problem Definition
Urban blind spots, such as narrow alleys, intersections, and school zones, have inherently posed a severe threat to traffic safety due to restricted visibility. In recent years, this chronic vulnerability has been significantly amplified by a contemporary social phenomenon: the rapid increase of distracted pedestrian youths. Specifically, adolescents around the age of 14 represent a high-risk demographic because, from a developmental perspective, the adolescent brain is still maturing in areas responsible for hazard perception and split-second risk assessment. Compounding this cognitive vulnerability is the widespread use of personal technology. A growing number of students walk through dangerous traffic environments with their eyes completely fixed on smartphone screens and their ears sealed by noise-canceling earphones. This combination of visual and auditory blockades effectively isolates them from their immediate surroundings, stripping them of the ability to detect oncoming vehicles or hear conventional warning sounds. Despite this escalating crisis, conventional road infrastructure remains stagnant. Traditional convex mirrors are passive fixtures that depend entirely on the premise that a pedestrian or driver will proactively look up. For a teenager whose gaze is cast downward, these traditional mirrors are practically invisible and utterly ineffective. Therefore, this project proposes 'O.Di', an artificial intelligence-driven, active public safety infrastructure designed to autonomously intervene in critical moments and bridge the dangerous gap left by passive traffic devices.

2. Design Process and Behavioral Scenario
The core philosophy of O.Di is embodied in its slogan: "The Vision That Illuminates Hidden Dangers." The design process began with a rigorous analysis of user behavior in blind spots, mapping out an interactive scenario where the system acts as an empathetic digital guardian. O.Di dynamically monitors the environment and orchestrates a synchronized multi-sensory warning sequence based on real-time threat levels through four critical stages. First, when a smartphone-dependent teenager enters the blind spot with diminished spatial awareness, the device registers the target. Second, the system immediately establishes a localized defensive perimeter by casting a bright, high-contrast warning light directly onto the pavement in front of the pedestrian, directly addressing the user's downward gaze without requiring a change in posture. Third, if an oncoming vehicle approaches from the opposite side of the blind spot, the system’s edge-computing core instantly calculates the intersection trajectory and collision probability. Fourth, upon confirming a simultaneous entry threat, O.Di elevates its warning level to maximum intensity, flashing visual stop icons on its large front display and broadcasting narrow-angle audio alerts. This rapid sequence transforms a passive blind spot into an active safety zone, granting vulnerable users the vital seconds needed to avoid a collision.

3. Core Technological Integration and Functional Specifications
To ensure high reliability within a compact, weather-resistant public installation, O.Di integrates a sophisticated hardware and software architecture driven by a Raspberry Pi 4 paired with an ESP32 microcontroller, self-contained within an aerodynamic housing underneath the mirror. At the center of O.Di’s intelligent perception is a high-resolution camera module that processes video locally via an optimized YOLO object detection algorithm. Rather than triggering alerts for every movement—which would cause severe public annoyance—the system utilizes a proprietary predictive logic. By analyzing the pixel-level expansion and shrinkage rates of object bounding boxes, the algorithm calculates the exact approach speed and detects genuine simultaneous entry risks, ensuring alerts are triggered exclusively during actual danger. To breach the visual bubble of phone-focused pedestrians, a high-power 3W LED optical projector projects vivid geometric warning signs directly onto the asphalt, triggering an instinctive braking reflex. Simultaneously, a high-density, weather-sealed LED matrix panel on the front facade switches to an emergency mode when a conflict is calculated, rendering a bright red vehicle shape alongside a universal stop symbol. Furthermore, to pierce through commercial noise-canceling algorithms without disturbing nearby residential zones, O.Di incorporates an acoustic wave-focusing directional speaker that focuses a narrow beam of audio energy solely toward the pathway of the endangered pedestrian.

4. Aesthetic Value and Sustainability
Beyond its technical capabilities, O.Di represents a major leap forward in public product aesthetics. Traditional traffic safety hardware is often industrial and visually disruptive to urban landscapes. O.Di breaks this paradigm by wrapping its advanced technology in a friendly, approachable exterior that seamlessly integrates civic art with safety engineering. The outer chassis features a modular, detachable frame designed to accommodate local government mascot characters, such as the familiar curves of a city's signature mascot. This emotional design approach serves two profound psychological functions: it softens the authority of a traffic sign for walking youth, drawing their eyes toward the mirror naturally, while serving as an immediate psychological landmark for drivers, signaling them to naturally decelerate. This structural modularity guarantees remarkable scaling potential, allowing any municipality to customize the device with their unique cultural identity without redesigning the internal mechanics. Ultimately, O.Di introduces a sustainable framework for next-generation smart city infrastructure. Empirical studies indicate that dynamic pavement warnings increase pedestrian stopping rates by over two-fold compared to static signage. While optimized for technology-dependent adolescents, O.Di’s core functionality naturally extends a protective umbrella over all vulnerable road users, including young children, parents with strollers, and elderly citizens, standing as an exemplary model of human-centered universal design.