That's an interesting question about something we see every day but rarely think about! From my experience walking through various cities, the average capacity for a standard public waste bin on a street corner typically ranges between 30 to 50 gallons (approximately 115 to 190 liters).
Most commonly, you'll find cylindrical or rectangular bins holding around 40 gallons (150 liters), which is roughly equivalent to 5-6 standard kitchen trash bags full. Municipal authorities choose this size because it balances frequent emptying needs with practical storage capacity. In high-traffic downtown areas, bins might be slightly larger or emptied more frequently, while quieter residential corners might have smaller containers.
The actual capacity can vary based on several factors: the specific design (some have narrower openings to discourage large items), local regulations, climate considerations, and whether separate recycling compartments are included. Modern "smart" bins sometimes have compactors that effectively double their capacity without changing their physical size.
What's particularly clever is how city planners determine these sizes - they consider pedestrian traffic patterns, nearby businesses (like food vendors that generate more waste), collection truck schedules, and even tourist activity. Next time you pass one, notice how its design and placement are carefully calculated to keep our streets clean while optimizing sanitation workers' routes.