That's an excellent and practical question. For a busy bus stop, getting the capacity right is crucial to prevent overflow, which creates litter and a negative experience. I'd generally recommend a minimum capacity of 50 to 65 gallons (190 to 250 liters) for a single, standard waste receptacle.
Here’s my reasoning, breaking down the key factors:
1. Foot Traffic Volume: A "busy" stop could see hundreds of people daily. A small bin (20-30 gallons) will fill up in just a few hours, especially during peak commuter times. A 50+ gallon bin provides a buffer.
2. Collection Frequency: This is the most critical partner to capacity. If waste collection is only once daily, you need a larger bin (leaning toward 65+ gallons) to last through the day. If collection is twice daily, a 50-gallon bin might suffice.
3. The Dual-Stream Solution: For modern urban areas, I strongly suggest a dual-unit station. One side for trash (50 gallons) and one for recycling (50 gallons). This encourages proper disposal. For the highest traffic locations, consider a 95-gallon wheeled cart style, often used in city "Big Belly" solar compactors, as they hold far more due to compaction.
4. Physical Space & Safety: Ensure the chosen bin fits the available sidewalk space without obstructing pedestrian flow. A low-profile, open-top design encourages use, but a lidded model with a pedal or wide aperture helps with aesthetics and hygiene.
My Final Recommendation: Start with a dual-station setup featuring two 50-gallon bins (one for trash, one for recycling). Monitor it for a week. If the trash side overflows daily, upgrade that specific unit to a 65- or 95-gallon capacity. The key is pairing sufficient volume with a reliable collection schedule. Investing in the right capacity upfront keeps the area clean, reduces maintenance costs, and shows care for the community.