All tolls or other revenues received from the operation of any toll bridge or other highway crossing, transportation facilities, or additional transportation facilities acquired or constructed with the proceeds of bonds issued and sold pursuant to this chapter shall be paid over by the department at least monthly to the State Treasurer who shall deposit them forthwith in such depositary or depositaries as are authorized by law to receive deposits of state funds, to the credit of a special fund to be designated as the toll revenue fund of the particular toll bridge or other highway crossing, transportation facilities, or additional transportation facilities producing the tolls or revenue, which fund shall at all times be kept segregated and set apart from all other funds.