(1) The State Aid Engineer shall allocate annually the amount of the state aid road allocation of a county that is requested by such county for use in the construction, reconstruction and paving of local system roads in the county if the county has met the requirements of this chapter; provided, however, that the State Aid Engineer shall not allocate more than twenty-five percent (25%) of the annual state aid road allocation of a county for such purposes.

(2) The State Aid Engineer shall allocate annually the amount of the Local System Bridge Replacement and Rehabilitation Program allocation of a county that is requested by such county for use in the construction, reconstruction and paving of local system roads in the county if:

(a) The State Aid Engineer has certified, pursuant to Section 65-37-7, that all the local system bridges within the county have a sufficiency rating of greater than fifty (50) or that all such bridges within the county with a sufficiency rating of fifty (50) or less are currently under contract for replacement or rehabilitation; and

(b) The county has met the requirements of this chapter.

(3) The State Aid Engineer shall establish specific designs and standards to be followed by such counties in the construction, reconstruction and paving of local system roads. The specific designs and standards shall be based upon policies on geometric design of local rural roads, highways and streets adopted and published by the American Association of State Highway and Transportation Officials.