In practice, locked urban trash bins usually add at least a little time to collection routes. Sanitation workers may need to stop, find the right key or code, unlock the bin, check that the waste is accessible, empty it, and then secure it again. If the lock is stiff, damaged, or blocked by trash, that small pause can turn into a much longer delay. Crews also need a clear key-management system, because missing or mixed-up keys can slow down an entire route.
The effect on collection times depends heavily on design and planning. Bins with simple, standardized locks and quick-access systems can keep delays small. But if every building or street uses different locks, workers lose time switching tools and confirming access. Locked bins can also change how crews move: they may need to collect at specific times, coordinate with property managers, or skip a bin and return later if no key is available. That can make routes less efficient and increase fuel and labor costs.
There is an upside, though. Locked bins can reduce illegal dumping, scavenging, and contamination, which may mean fewer repeat visits and cleaner loads. So the real impact is a trade-off. On their own, locks tend to increase collection time slightly; with standard locks, reliable key access, staff training, and route adjustments, cities can limit the delay and still get the security benefits.