(a) The transportation infrastructure fund is a dedicated fund in the state treasury outside the general revenue fund. The fund consists of:
(1) any federal funds received by the state deposited to the credit of the fund;
(2) matching state funds in an amount required by federal law;
(3) funds appropriated by the legislature to the credit of the fund;
(4) a gift or grant;
(5) any fees paid into the fund; and
(6) investment earnings on the money on deposit in the fund.
(b) Money in the fund may be appropriated only to the department for the purposes of this subchapter.
(c) Sections 403.095 and 404.071, Government Code, do not apply to the fund.