That's an excellent and very practical question. For a high-traffic downtown area, I generally recommend starting with a minimum capacity of 50 to 65 gallons (190 to 250 liters) for your primary pedestrian waste bins. Here’s the reasoning behind this recommendation, based on both function and urban management realities.
The core challenge in a downtown setting isn't just daily volume, but peak accumulation. During lunch rushes, evening events, or weekend crowds, smaller bins (like 20-30 gallon) can overflow in a matter of hours. A 50-65 gallon bin provides a critical buffer, allowing for fewer collection cycles and reducing the chances of litter scattering from an overfull receptacle. This size is large enough to be effective but not so massive that it becomes an unsightly obstruction on the sidewalk.
However, capacity is only one part of the equation. The design and functionality of the bin are equally important. Look for models with a wide, clearly marked opening to encourage proper use. Durable, vandal-resistant construction is a must. In very dense zones like transit hubs or public squares, consider even larger units (95+ gallons) or paired recycling compartments to handle the immense load.
Ultimately, the "right" capacity depends on a quick audit: foot traffic volume, proximity to food vendors, and your collection team's schedule. A 65-gallon bin collected twice daily is often far more effective than a smaller bin collected once. The goal is to choose a bin that contains the waste reliably between scheduled pickups, maintaining cleanliness and civic pride in your bustling urban core.