Trolley cars, also known as streetcars or trams, are vehicles that run on tracks and are powered by electricity. They typically operate in urban areas, providing public transportation for passengers. Trolley cars are often seen in cities like San Francisco and New Orleans, where they are a popular and iconic mode of travel. These vehicles are usually connected to overhead wires through a pole or pantograph, allowing them to draw power. Trolley cars can be found in various designs, from vintage models to modern versions, and they help reduce traffic congestion while promoting eco-friendly transportation options.