Raccoon Express by James Ng
"A combination of steam ingenuity and street food culture, the Raccoon Express is a famous attraction of the Imperial City. A catchy tune performed by the chimney-bots signals its arrival and entices the public. A robotic cashier - human and steam-powered workers alike - cater frantically to a hungry crowd during its brief stop. Even the nobility welcomes the Express, for it allows them to sample the food of the peasants without trudging through the slums they consider well below their standards."
"A pack of trained raccoons trail the Express, cleaning up any mess left behind by the hungry mob near the tracks. Indeed, they are more than happy to finish scraps off the containers and skewers before placing them into the bin."