That's an excellent and practical question! The answer really depends on the specific design of the trash can, but modern urban bins are generally designed with mobility in mind, even when full.
Most public trash cans in cities today, especially the larger ones, are equipped with heavy-duty wheels and a sturdy handle or a low-gravity design. When they are full, a single maintenance worker can usually tilt them back onto their wheels and roll them to the collection point with relative ease. The wheels are often large and robust to handle uneven pavement and the significant weight.
However, "easy" is subjective. A fully loaded 100-gallon bin can be very heavy. While the wheels make it *possible* to move, it still requires considerable physical effort. For this reason, many cities use specialized lifting trucks that mechanically empty the bins without requiring workers to move them long distances manually. So, while they are *movable*, the process is designed to be as ergonomic and efficient as possible within the larger waste collection system. The key takeaway is that mobility is a core feature, but practical handling often involves a combination of human effort and mechanical assistance.