52In section 45(8) (provisions as to dual carriageways, roundabouts and street refuges), for the words " county or town council" there shall be substituted the words " local highway authority ", and in the substituted subsection (5) in that subsection, for the words " council of a county or a burgh as defined in the [1947 c. 47.] Local Government (Scotland) Act 1947 " there shall be substituted the words " local highway authority as defined in the Local Government (Scotland) Act 1973 ".