This chapter does not affect and is not intended to affect any rights, powers, interest, or liability of the state or the Department of Transportation with respect to the state highway system, the county road system, or the municipal street system, or of a county with respect to the county road system or of a municipality with respect to the city street system, with relation to any underground facility which is or may be installed within the limits of any public road or street right of way, whether the installation is by written or verbal permit, easement, or any form of agreement whatsoever.
OCGA § 25-9-11