what is the only now defunct railroad that existed for 156 years?
baltimore and ohio railroad
col : name | mark | system | from | to | successor | notes row 1 : alexandria and fredericksburg railway |  | rf&p | 1872 | 1890 | baltimore and potomac railroad |  row 2 : alexandria and washington railroad |  | rf&p | 1854 | 1872 | alexandria and fredericksburg railway |  row 3 : baltimore and ohio railroad | b&o, bo | b&o | 1831 | 1987 | chesapeake and ohio railway |  row 4 : baltimore and potomac railroad |  | prr | 1867 | 1902 | philadelphia, baltimore and washington railroad |  row 5 : chesapeake beach railway |  |  | 1896 | 1935 | east washington railway |  row 6 : chesapeake and ohio railway | c&o, co | c&o | 1891 | 1987 | csx transportation |  row 7 : consolidated rail corporation | cr |  | 1976 | 1999 | csx transportation/norfolk southern railway |  row 8 : east washington railway |  |  | 1935 | 1976 | n/a |  row 9 : georgetown barge, dock, elevator and railway company |  | b&o | 1888 | 1972 | baltimore and ohio railroad |  row 10 : orange, alexandria and manassas railroad |  | sou | 1872 | 1872 | virginia and north carolina railroad |  row 11 : penn central transportation company | pc |  | 1968 | 1976 | consolidated rail corporation |  row 12 : pennsylvania railroad | prr | prr | 1918 | 1968 | penn central transportation company |  row 13 : philadelphia, baltimore and washington railroad |  | prr | 1902 | 1976 | consolidated rail corporation |  row 14 : philadelphia, wilmington and baltimore railroad |  | prr | 1891 | 1902 | philadelphia, baltimore and washington railroad |  row 15 : richmond and danville railroad |  | sou | 1886 | 1894 | southern railway |  row 16 : richmond, fredericksburg and potomac railroad | rf&p, rfp | rf&p | 1920 | 1991 | richmond, fredericksburg and potomac railway |  row 17 : richmond, fredericksburg and potomac railway | rfp |  | 1991 |  |  | still exists as a subsidiary of csx transportation row 18 : southern railway | sou | sou | 1894 | 1990 | norfolk southern railway |  row 19 : southern maryland railroad |  |  | 1882 | 1886 | washington and potomac railroad |  row 20 : virginia midland railway |  | sou | 1880 | 1886 | richmond and danville railroad |  row 21 : virginia and north carolina railroad |  | sou | 1872 | 1873 | washington city, virginia midland and great southern railway |  row 22 : washington, alexandria and georgetown railroad |  | rf&p | 1862 | 1868 | alexandria and washington railroad |  row 23 : washington city and point lookout railroad |  | b&o | 1873 | 1874 | baltimore and ohio railroad |  row 24 : washington city, virginia midland and great southern railway |  | sou | 1873 | 1880 | virginia midland railway |  row 25 : washington and potomac railroad |  |  | 1886 | 1900 | washington, potomac and chesapeake railroad |  row 26 : washington, potomac and chesapeake railroad |  |  | 1901 | 1910 | washington, potomac and chesapeake railway |  row 27 : washington, potomac and chesapeake railway |  |  | 1910 | 1918 | chesapeake beach railway |  row 28 : washington southern railway | wsn | rf&p | 1901 | 1920 | richmond, fredericksburg and potomac railroad |  row 29 : washington terminal company | watc | b&o/ prr | 1901 |  |  | still exists as a subsidiary of the national railroad passenger corporation ( row 30 : washington and western maryland railroad |  | b&o | 1889 | 1985 | n/a |
what is the only now defunct railroad that existed for 156 years?
Name Mark System From To Successor Notes
Alexandria and Fredericksburg Railway RF&P 1872 1890 Baltimore and Potomac Railroad
Alexandria and Washington Railroad RF&P 1854 1872 Alexandria and Fredericksburg Railway
Baltimore and Ohio Railroad B&O, BO B&O 1831 1987 Chesapeake and Ohio Railway
Baltimore and Potomac Railroad PRR 1867 1902 Philadelphia, Baltimore and Washington Railroad
Chesapeake Beach Railway 1896 1935 East Washington Railway
Chesapeake and Ohio Railway C&O, CO C&O 1891 1987 CSX Transportation
Consolidated Rail Corporation CR 1976 1999 CSX Transportation/Norfolk Southern Railway
East Washington Railway 1935 1976 N/A
Georgetown Barge, Dock, Elevator and Railway Company B&O 1888 1972 Baltimore and Ohio Railroad
Orange, Alexandria and Manassas Railroad SOU 1872 1872 Virginia and North Carolina Railroad
Penn Central Transportation Company PC 1968 1976 Consolidated Rail Corporation
Pennsylvania Railroad PRR PRR 1918 1968 Penn Central Transportation Company
Philadelphia, Baltimore and Washington Railroad PRR 1902 1976 Consolidated Rail Corporation
Philadelphia, Wilmington and Baltimore Railroad PRR 1891 1902 Philadelphia, Baltimore and Washington Railroad
Richmond and Danville Railroad SOU 1886 1894 Southern Railway
Richmond, Fredericksburg and Potomac Railroad RF&P, RFP RF&P 1920 1991 Richmond, Fredericksburg and Potomac Railway
Richmond, Fredericksburg and Potomac Railway RFP 1991 Still exists as a subsidiary of CSX Transportation
Southern Railway SOU SOU 1894 1990 Norfolk Southern Railway
Southern Maryland Railroad 1882 1886 Washington and Potomac Railroad
Virginia Midland Railway SOU 1880 1886 Richmond and Danville Railroad
Virginia and North Carolina Railroad SOU 1872 1873 Washington City, Virginia Midland and Great Southern Railway
Washington, Alexandria and Georgetown Railroad RF&P 1862 1868 Alexandria and Washington Railroad
Washington City and Point Lookout Railroad B&O 1873 1874 Baltimore and Ohio Railroad
Washington City, Virginia Midland and Great Southern Railway SOU 1873 1880 Virginia Midland Railway
Washington and Potomac Railroad 1886 1900 Washington, Potomac and Chesapeake Railroad
Washington, Potomac and Chesapeake Railroad 1901 1910 Washington, Potomac and Chesapeake Railway
Washington, Potomac and Chesapeake Railway 1910 1918 Chesapeake Beach Railway
Washington Southern Railway WSN RF&P 1901 1920 Richmond, Fredericksburg and Potomac Railroad
Washington Terminal Company WATC B&O/ PRR 1901 Still exists as a subsidiary of the National Railroad Passenger Corporation (Amtrak)
Washington and Western Maryland Railroad B&O 1889 1985 N/A
Baltimore and Ohio Railroad