Separate legislation allows the Federal Highway Administration to approve additional mileage if it meets full Interstate standards and would be a logical addition or connection.
Beyond the 42,795 miles, this additional mileage is not "chargeable"—that is, it is not eligible for Interstate Construction funds under the , as amended, although the State may use other Federal-aid funds to help with construction. The Interstate System was built under the principles of the Federal-aid highway program, which was established in 1916.
President Eisenhower insisted that the financing mechanism for the Interstate System be "self-liquidating," so that it could not add to the national debt.
However, the report added that the country needed a toll-free express highway network. As an army Lieutenant Colonel in 1919, Eisenhower had accompanied a military convoy across the United States and saw the poor condition of our Nation's roads.
Fairbank, Chief of the agency's Division of Information, prepared the report.
If sufficient funds are not available, the program must be reduced administratively in proportion to the imbalance.
The Highway Trust Fund financing mechanism established in the satisfied President Eisenhower's "self-liquidating" demand.
As a result, the FHWA obligation results in reimbursements to the State for the Federal share over several years.