arguably one of the first planned communities in the United States, designed in 1869 by Frederick Law Olmsted. Horsecar and cable car suburbs However, the suburbs closest to the city were based on horsecars and eventually cable cars. First introduced to America around 1830, the horse-drawn omnibus was revolutionary because it was the first mass transit system, offering regularly scheduled stops along a fixed route, allowing passengers to travel three miles sitting down in the time it would take them to walk two miles. Later more efficient horse-drawn streetcars allowed cities to expand to areas even more distant. By 1860, they operated in most major American and Canadian cities, including New York, Baltimore, Philadelphia, Chicago, Cincinnati, Saint Louis, Montreal, and Boston. Horsecar suburbs emanated from the city center towards the more distant railroad suburbs. For the first time, transportation began to separate social and economic classes in cities, as the working and middle class continued to live in areas closer to the city center, while the rich could afford to live farther out. History Development The introduction of the electrical streetcar in Richmond, Virginia, in 1887 by Frank J. Sprague marked the start of a new era of transportation-influenced suburbanization through the birth of the "streetcar suburb". The early trolley allowed people to effortlessly travel in 10 minutes what they could walk in 30, and was rapidly introduced in cities like Boston and Los Angeles, and eventually to all larger American and Canadian cities. There were 5,783 miles of streetcar track serving American cities in 1890; this grew to 22,000 by 1902 and 34,404 by 1907. By 1890, electric streetcar lines were replacing horse-drawn ones in cities of all sizes, allowing the lines to be extended and fostering a tremendous amount of suburban development. They were often extended out to formerly rural communities, which experienced an initial surge of development, and then new residential corridors were created along the newly built lines leading to what had sometimes been separate communities. On side streets, the houses closest to the original streetcar line are often as much as ten to twenty years older than houses built farther down the street, reflecting the initial surge and slow completion of a development. Because streetcar operators offered low fares and free transfers, commuting was finally affordable to nearly everyone. Combined with the relatively cheap cost of land farther from the city, streetcar suburbs were able