(a) The commissioners court of a county may issue bonds authorized under Subtitle A and Chapter 1251 to:
(1) build a county courthouse or jail;
(2) purchase suitable sites in the county and to construct buildings on the sites for homes or schools for dependent or delinquent children;
(3) establish county facilities for needy or indigent persons in the county;
(4) purchase and construct bridges for public purposes in the county or to cross a stream serving as the county’s boundary line;
(5) improve and maintain the public roads in the county; or
(6) restore or maintain a county courthouse.
(b) The commissioners court may issue bonds only if a majority of the voters at an election to authorize bonds vote in favor of the proposition to authorize the bonds.

(c) Bonds to purchase or construct a bridge and to improve and maintain a public road may be submitted by the commissioners court and voted on as one proposition.