The Dual Contracts resulted in the expansion of New York City; people moved to the newly built homes along the newly built subway lines. These homes were affordable, about the same cost as the houses in Brooklyn and Manhattan. The Dual Contracts were the key to dispersion of the city's congested areas. They helped alleviate densely populated areas and probably helped save lives as people were no longer living in heavily diseased areas. The population in Manhattan below 59th Street decreased between the years of 1910 and 1920. People were allowed to move to better parts at the same cost and could have a better and more comfortable life in the suburbs.
