Columbia subject headings:
Railroads--Northeastern States.
Harvard subject headings:
Federal aid to transportation--United States.
Northeast Corridor Improvement Project (U.S.)
Railroads--Middle Atlantic States--Passenger traffic.
Railroads--Northeastern States--Passenger traffic.
Railroads--Northeastern States.
Railroads--United States--Finance
United States. Northeast Corridor Transportation Project.
Princeton subject headings:
Federal aid to transportation--United States.
Railroads--Middle Atlantic States--Passenger traffic.
Railroads--Northeastern States--Passenger traffic.
Railroads--United States--Finance.