EXHIBIT NO. 2.-Total capital expenditures for additions and betterments, class I line-haul railways, 1921–57

Source: Bureau of Railway Economics, Association of American Railroads; Interstate Commerce Commission, statements M-125.

EXHIBIT NO. 3.-Age of locomotives in the United States, class I line-haul railways, as of Dec. 31, 1936, 1941, 1946, and 1956

Source: Interstate Commerce Commission, Statistics of Railways in the United States.

EXHIBIT NO. 4.-Age of freight-carrying cars in the United States, class I line-haul railways, as of Jan. 1, 1934, 1939, 1947, and 1956

EXHIBIT NO. 5.-Net cash flow and equipment obligations outstanding, class I
line-haul railways, 1921–57

Source: Interstate Commerce Commission, Statistics of Railways in the United States, Statement M-125.

EXHIBIT NO. 6.-Total costs per traffic unit and per gross ton-mile, class I
line-haul railways, 1922-57

1 Includes operating costs plus equipment and facility rents and taxes.

2 Not available.

* Preliminary.

Source: Interstate Commerce Commission, Statistics of Railways in the United States, Statement
M-100, M-211, M-213, and M-220.

EXHIBIT NO. 7.—Revenues per ton-mile and per passenger-mile, class I line-haul
railways, 1921-57

Source: Interstate Commerce Commission, Statistics of Railways in the United States, Statements
M-100 and M-220.

EXHIBIT NO. 8.-Net income, class I line-haul railways, 1921–57

Source: Interstate Commerce Commission, Statistics of Railways in the United States, Statement M-125.
EXHIBIT NO. 9.-Mileage of line-haul steam railroads operated by receivers or
trustees at various dates, 1895-1956

1 As of June 30, 1895 to 1915, inclusive. As of Dec. 31, 1920 to 1956, inclusive.

Source: Annual report of Interstate Commerce Commission, 1957, appendix C, p. 170.