A county may issue certificates of indebtedness:
(1) in an amount not to exceed $2 million to construct, enlarge, furnish, equip, or repair a county building or other permanent improvement; or
(2) in an amount not to exceed $3.5 million to:
(A) purchase right-of-way in participation with the Texas Department of Transportation in connection with a designated state highway; or
(B) construct a curb, gutter, or drainage facility for a designated state highway.