For a busy city sidewalk, I’d usually start with a 45–50 gallon trash can. That size tends to hit the sweet spot: it holds enough waste to get through peak foot traffic without becoming so heavy or bulky that servicing turns into a hassle. If the block has constant pedestrian traffic, food carts, coffee shops, and bus stops, I’d lean toward 50 gallons, or even 55–65 gallons only if collection is reliable and the sidewalk has plenty of clearance. A 32-gallon bin can work on lighter corners, but on a truly busy sidewalk it often fills too fast and ends up overflowing.
The bigger question isn’t just capacity—it’s collection frequency. A 50-gallon bin that gets emptied daily will usually outperform a 65-gallon bin that sits half-full for days. For busy sidewalks, I’d look for a commercial-grade can with a controlled opening, a sturdy lid or hood, and a liner system that makes emptying fast. That helps cut down on windblown litter, odors, pests, and the dreaded overflow of coffee cups and food containers.
Also check the practical stuff before you buy: local streetscape rules, ADA clearance, sidewalk width, and whether your collection crew can handle the can’s weight when full. If you’re placing bins along a busy corridor, anchor them or use weighted bases so they don’t drift into the pedestrian path. Pair trash with recycling where it makes sense, but don’t cram too many bins into a narrow space.
So my practical recommendation? For most busy city sidewalks, choose 45–50 gallon urban trash cans, use 32 gallons for lighter traffic, and go larger only when you have frequent pickup and enough room. That balance keeps the sidewalk cleaner without creating a maintenance headache.