(a) The governing body of a municipality located in a county in which is located a facility licensed to dispose of low-level radioactive waste under Chapter 401, Health and Safety Code, may enter into an interlocal contract with the county for the construction and maintenance of a relief highway route around and outside the boundaries of the municipality that the governing body determines will serve a public purpose of the municipality.
(b) The municipality may expend municipal funds and may issue certificates of obligation or bonds to pay for expenses associated with a relief highway route under Subsection (a).