What is the effect on growth of railroads have on the nations Urbanization

In 1893, the United States celebrated the 400th anniversary of the "discovery" of the New World with a spectacular fair in Chicago. The Transportation Building at the "World's Columbian Exposition" featured railroad exhibits and equipment from around the world, but the most lavish displays were from Baldwin Locomotive Works, the Pullman Palace Car Company, and other American companies. The B&O erected a huge exhibit tracing the entire history of the railroad, while the Pennsylvania and New York Central railroads had separate exhibit buildings.