Yes, they exist—though you usually won’t see a public “I’m full” light on every bin. Many cities use smart waste bins with ultrasonic or infrared fill-level sensors. The bin measures how full it is and sends an alert over cellular, LoRaWAN, or NB-IoT to a collection dashboard. Some are solar-powered compactors that press trash down and report status, while simpler models just monitor fill level. Crews then empty bins only when needed, which reduces overflow, fuel use, and unnecessary truck trips. You’ll find these systems in cities like Baltimore, Philadelphia, and Copenhagen, and in pilot projects elsewhere. A few bins have indicator lights for the public, but most “signaling” happens behind the scenes to municipal teams. They’re not everywhere because they cost more upfront and need maintenance, battery checks, and clean sensor data. Still, for busy urban spots, they’re a practical way to answer the question “Is it full yet?” before trash hits the street.
Are there urban trash cans that signal when they're full?
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