the Hudson River from Manhattan. The latter extended to the Bronx, whence it continued into Manhattan via trackage rights on the New York and Harlem Railroad. It also reached the Bronx via the Harlem River and Port Chester Railroad, which extended to the Bronx from the New Haven at New Rochelle. From 1903 to 1917, the two railroads undertook a number of projects that connected their lines and completed, in effect, the Northeast Corridor. These included the New York Tunnel Extension in New Jersey (including Manhattan Transfer station and a new Pennsylvania Station), the New York Connecting Railroad and the Hell Gate Bridge. Combined, these creations were a stretch that started just above Newark, New Jersey, on the Pennsylvania Railroad side, and connected with the Harlem River and Port Chester Railroad (and thus New Rochelle) on the New Haven side. With the opening of the Hell Gate Bridge in 1917, this connecting stretch and thus the Northeast Corridor itself were complete. With the 1968 creation of Penn Central, which was a combination of those two railroads and the New York Central Railroad, the entire corridor was under the control of a single entity for the first time. After successor Penn Central’s 1970 bankruptcy, the corridor was almost entirely subsumed, on May 1, 1971, by the subsequently-created Amtrak. Boston–The Bronx (New Haven Railroad) Boston–Providence: Boston and Providence Railroad opened 1835, partially realigned in 1847 and in 1899. Became part of the Old Colony Railroad in 1888. Providence–Stonington: New York, Providence and Boston Railroad opened 1837; partially realigned 1848. Stonington–New Haven: New Haven, New London and Stonington Railroad opened 1852–1889, realigned in New Haven, 1894. New Haven–New Rochelle: New York and New Haven Railroad opened 1849. New Rochelle–Port Morris (Bronx): Harlem River and Port Chester Railroad opened 1873. Newark–Washington, D.C. (Pennsylvania Railroad) Newark–Trenton: United New Jersey Railroad and Canal Company opened 1834–1839, 1841; partially realigned 1863 and 1870. Trenton–Frankford Junction: Philadelphia and Trenton Railroad opened 1834; partially realigned 1911. Frankford Junction–Zoo Tower: Connecting Railway opened 1867. Zoo Tower–Grays Ferry Bridge: Junction Railroad opened 1863–1866. Grays Ferry–Bayview: Philadelphia, Wilmington and Baltimore Railroad opened 1837–1838, 1866, 1906. Bayview Yard–Baltimore Union Station: Union Railroad opened 1873. Baltimore Union Station–Landover: Baltimore and Potomac Rail Road opened 1872. Landover–Washington, D.C.: Magruder Branch opened 1907 New York City area Manhattan Transfer station (just above Newark), opened 1910 New York Tunnel Extension, opened 1910 Pennsylvania Station (1910–1963), completed 1910