Pedestrians are extremely vulnerable at night. Over 75% of pedestrian fatalities happen after dark, largely due to poor visibility. Existing safety gear — reflective vests, belts, neon clothing — often goes unused because it's inconvenient, unfashionable, or not designed for daily wear.
We set out to design a product people actually want to wear. Something that blends safety, fashion, convenience, and everyday functionality. We chose the most universally worn item for students and commuters: the backpack.
The Problem
- 6,000+ pedestrian fatalities per year in the U.S., 75% after dark.
- 78% of college students expressed concern about nighttime visibility.
- 90% admitted they never wear existing reflective safety gear due to appearance and inconvenience.
Our Solution: LitPak
We designed LitPak, a backpack that integrates:
- LED lighting for active visibility
- Reflective materials for passive visibility
- Conductive thread for embedded wiring
- Rechargeable battery system for all-day usage
- Smart power management using motion-sensing gyroscopes to automatically shut off lights when idle
The LitPak functions as both a daily-use backpack and a nighttime safety device—without sacrificing style.
User-Driven Design
Throughout development, we conducted extensive:
- User interviews (81 students) to assess behavior, concerns, and product expectations
- User testing (8 participants per iteration) to evaluate comfort, appearance, and usability
- Iterative prototyping (3 full hardware iterations) to refine design, materials, electronics, and usability
By the final prototype, our product scored:
- Comfort: 9/10
- Appearance: 8.8/10
- Perceived Safety: 8.5/10
- Convenience: 9.5/10
Key Features
- Seamlessly embedded LEDs on both sides, front, and shoulder straps
- Reflective flame design for added visibility
- Rechargeable lithium-ion battery (19.9 hours runtime)
- Motion-activated power-saving gyroscope
- Four main compartments, water bottle holders, and laptop sleeve
- Polyester body for water resistance and durability
- Durable insulated 24-gauge copper wiring along inner seams
Benchmark Testing
| Test Type | Key Result |
|---|---|
| Visibility | Increased detection distance from 61 ft to 221 ft |
| Battery | 19.9 hours continuous LED usage |
| Durability | Passed 30-cycle drop test with no functional failures |
| Reflective Wear | Minimal degradation after extreme abrasion |
Market & Economic Viability
We conducted full financial modeling to explore commercial viability:
- Target audience: college students, parents of young children, walking commuters
- Sale price: $140 per unit (competitive with premium backpacks)
- Manufacturing: scalable with decreasing unit costs at higher volumes
- Break-even point: 2.5 years under conservative growth projections
Future Opportunities
- Child-specific designs (colored LEDs, customizable patterns)
- Expansion to jackets, briefcases, purses, and other commuter accessories
- Smarter sensors to activate lights based on oncoming traffic detection (next-gen R&D)
Conclusion
The LitPak successfully met its design goals: create a fashionable, functional backpack that makes nighttime pedestrians significantly more visible without compromising everyday usability.
With user-centered design, rigorous testing, and real-world feedback guiding development, LitPak demonstrates how thoughtful hardware design can blend safety and convenience into a genuinely useful product.