what are all the railroads?
alexandria and fredericksburg railway, alexandria and washington railroad, baltimore and ohio railroad, baltimore and potomac railroad, chesapeake beach railway, chesapeake and ohio railway, consolidated rail corporation, east washington railway, georgetown barge, dock, elevator and railway company, orange, alexandria and manassas railroad, penn central transportation company, pennsylvania railroad, philadelphia, baltimore and washington railroad, philadelphia, wilmington and baltimore railroad, richmond and danville railroad, richmond, fredericksburg and potomac railroad, richmond, fredericksburg and potomac railway, southern railway, southern maryland railroad, virginia midland railway, virginia and north carolina railroad, washington, alexandria and georgetown railroad, washington city and point lookout railroad, washington city, virginia midland and great southern railway, washington and potomac railroad, washington, potomac and chesapeake railroad, washington, potomac and chesapeake railway, washington southern railway, washington terminal company, washington and western maryland railroad
which railroads are now defunct?
alexandria and fredericksburg railway, alexandria and washington railroad, baltimore and ohio railroad, baltimore and potomac railroad, chesapeake beach railway, chesapeake and ohio railway, consolidated rail corporation, east washington railway, georgetown barge, dock, elevator and railway company, orange, alexandria and manassas railroad, penn central transportation company, pennsylvania railroad, philadelphia, baltimore and washington railroad, philadelphia, wilmington and baltimore railroad, richmond and danville railroad, richmond, fredericksburg and potomac railroad, southern railway, southern maryland railroad, virginia midland railway, virginia and north carolina railroad, washington, alexandria and georgetown railroad, washington city and point lookout railroad, washington city, virginia midland and great southern railway, washington and potomac railroad, washington, potomac and chesapeake railroad, washington, potomac and chesapeake railway, washington southern railway, washington and western maryland railroad
which defunct railroad existed for the shortest time?
orange, alexandria and manassas railroad