That's a fantastic question, and it's something that truly impacts the daily experience of everyone in a city. From my observations and research, the best way to arrange outdoor trash cans isn't about just putting them everywhere, but about strategic, thoughtful placement based on need and human behavior.
First, density and location are key. High-traffic areas like transit stops, park entrances, street corners near food vendors, and public squares need bins at close intervals—often every 50 to 100 feet. The goal is to have a bin in sight before littering becomes a temptation. On quieter residential blocks, spacing can be wider, but should always be at predictable points like intersections.
Second, visibility and accessibility are non-negotiable. Trash cans must be clearly visible, not hidden behind signs or greenery. They should be placed on stable, level ground, slightly away from building walls to allow for easy servicing and to discourage pests. Pairing them with recycling bins in a unified "waste station" is now a best practice.
Third, consider capacity and collection logistics. The size and number of bins must match the expected volume of waste. A tiny bin at a busy bus stop will overflow immediately, creating a bigger mess. Placement must allow garbage trucks easy and safe access for frequent, reliable emptying. An overflowing can is worse than no can at all.
Finally, community input and adaptability make the system work long-term. Residents and business owners know the problem spots. Piloting different arrangements and being ready to move a can 20 feet based on real-world use is crucial. The best arrangement is a clean street, so the system must evolve to achieve that.
In short, the best arrangement is a proactive, data-informed network that makes proper disposal the easiest choice for pedestrians, while ensuring efficient and reliable service from the sanitation department. It's a blend of urban planning, behavioral psychology, and practical logistics.