The proceeds from the sale of all bonds authorized pursuant to this chapter shall be paid to the State Treasurer for the credit of the commission and forthwith deposited as demand deposits in such depositary or depositaries as are authorized by law to receive deposits of state funds, to the credit of a fund to be designated as the acquisition and construction fund of the particular toll bridge or other highway crossing, transportation facilities, or additional transportation facilities for which the bonds were issued and sold. The fund shall, at all times, be kept segregated and set apart from all other funds.