Gujarat Provincial Municipal Corporations Act, 1949
(1) The Corporation shall from time to time with the sanction of the [State] Government specify the minimum width for different classes of public streets according to the nature of the traffic likely to be carried thereon, the localities in which they are situated, the heights up to which buildings abutting thereon may be erected and other similar considerations. (2) The width of a new public street made under section 205 shall not be less than that prescribed under sub-section (1) for the class to which it belongs, and no steps and, except with the written permission of the Commissioner under section 227, no other projections shall extend on to any such street.