In the following years, Pleasantville quickly developed into a modern suburb of New York, with a large number of workers commuting between the village and the metropolis on what is now the Metro-North Railroad's Harlem Line. During the first two decades of the 20th century, roads were paved for the first time, water mains were installed, and electrical wires brought power to the village's houses. Other improvements during the first half of the 20th century include the construction of Soldiers and Sailors Field in 1909, the Saw Mill River Parkway in 1924, the Rome Theater in 1925, Memorial Plaza in 1930, Parkway Field in 1930, and Nannahagen Park in 1937 (the adjacent village pool was completed two years later). By the time of World War II, the village had taken on the appearance that it bears today.