That's a great question, and one that city planners think about a lot! The maintenance for modern urban trash cans is generally designed to be straightforward, though it varies by model. For standard heavy-duty steel or plastic bins, routine maintenance involves regular washing to prevent odors and corrosion, along with checks for cracks, rust, or broken hinges. Many newer "smart" bins with compactors or sensors require periodic battery changes and software updates.
As for parts, yes, replaceable components are a key feature of professional-grade city bins. Common parts like lids, hinges, locking mechanisms, inner buckets, and wheels are typically designed for easy swap-out. Most manufacturers use standardized bolts and fittings, so a maintenance crew doesn't need special tools. For smart bins, modular sensor units and compactor mechanisms are also made to be replaced as a single unit to minimize downtime.
The real goal is durability and easy service. High-traffic areas need bins that can withstand constant use, and when something does break, cities need a fix that's fast and simple to keep the public space clean and functional.