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Rh and studied by the Bureau of Public Roads and State highway department engineers in preparing the detailed designs, plans, and specifications, on which actual construction bids will be invited. It must be recognized that the estimate totals are based on current prevailing factors and carry no forecast of future trends, either upward or downward.

The estimated costs to be borne by the highway trust fund and State matching funds are considered adequate for the purposes described in this report. It is therefore recommended that the estimates and apportionment factors shown in table D be approved by the Congress by concurrent resolution, in order to permit the Secretary of Commerce to apportion the authorized funds for fiscal years 1960, 1961, and 1962 as soon as revenues in the trust fund are estimated to be sufficient as required by the provisions of the Federal-Aid Highway Act of 1956, and the Highway Revenue Act of 1956.