4.(1) The Government may, after previous publication, make rules- (i) for the regulation and safety of traffic on Government roads; ¹[(ia) for the regulation of construction works within ten meters of such Government roads called National Highways and Regional Highways;] (ii) for the prevention of obstruction and encroachments and of nuisances on or near such roads; (iii) for the preservation of such road; and (iv) for the temporary closing of such roads for repairs or other works, or for the purposes specifically set forth in section 3. (2) and (3) [Omitted by section 6 of the Bengal Highways (Extension to Sylhet) Ordinance, 1959 (Ordinance No. LXII of 1959).]