Capital Subdivision Capital Subdivision The Capital Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. state of Maryland and the District of Columbia. The line runs from near Baltimore, Maryland southwest to Washington, D.C. along the former Baltimore and Ohio Rail Road (B&O) Washington Branch. The subdivision's Alexandria Extension provides a connection to Virginia and points south. The northeast end of the line is at Halethorpe, Maryland, just north of the historic Thomas Viaduct, where it meets the Baltimore Terminal Subdivision and the Old Main Line Subdivision. Its southwest end is at the yard north of Union
Summerfield, Maryland Summerfield, Maryland Summerfield is a census-designated place near Landover in Prince George's County, Maryland, in the United States. The population of the CDP was 10,898 at the 2010 census. It is a suburb of Washington, D.C. Fedex Field is located in Summerfield CDP, as is the Prince George's County Sports and Learning Complex. Prior to the 2010 Census, the area was not covered by another census-designated place. According to the U.S. Census Bureau, Summerfield has a total area of , of which , or 0.03%, is water. The CDP is bordered to the east by the Capital Beltway (I-495/95) and