Ala. Code § 23-1-307

The authority shall have the power and is hereby authorized and empowered to sell and issue its bonds in order to provide as soon as practicable the federal share of the cost of constructing federal aid projects in anticipation of the receipt by the state of such federal portions as they become available either during, upon or after completion of such construction. The authority shall have the power, in addition to any other powers granted in this article, to borrow money for temporary use for any of the purposes for which it is authorized by this article to issue bonds and, in evidence of such borrowing, to issue from time to time temporary bonds or notes. Any such temporary borrowing may be made in anticipation of the sale and issuance of bonds and in such event the principal proceeds from the sale of such bonds shall, to the extent necessary, be used for payment of the principal of and interest on the temporary bonds or notes issued in anticipation of the sale and issuance of such bonds. Subject to the provisions and limitations contained in this article, the authority may, from time to time, sell and issue refunding bonds for the purpose of refunding any matured or unmatured obligations of the authority issued under this article and then outstanding.