Streetcars were the main form of public transportation in Cincinnati, Ohio, at the end of the 19th century and the start of the 20th century. The first electric streetcars began operation in 1889, and at its maximum, the streetcar system had 222 miles (357 km) of track and carried more than 100 million passengers per year. A very unusual feature of the system was that cars on some of its routes traveled via inclined railways to serve areas on hills near downtown. With the advent of inexpensive automobiles and improved roads, transit ridership declined in the 20th century and the streetcar system closed in 1951.