The American Elevated Railway, commonly known as the EL, is a rapid transit system in the Northeastern United States. It was first opened in 1867 and is one of the oldest public transportation systems in the world. The EL operates in several major cities, including New York City, Philadelphia, and Boston. It consists of elevated trains that run on tracks above the ground, allowing for faster travel times and more efficient use of space. The EL is an important part of the public transportation infrastructure in the region, providing millions of people with access to jobs, education, and other opportunities.