32. The respondent, in the impugned orders has held inter alia that the road alignment plans, which are challenged by the petitioners, is still in force and necessary to be maintained for smooth vehicular movement, better infrastructure and overall development of the area for greater public interest. Admittedly it is a plan prepared about 100 years ago, which has remained unimplemented till date. The drastic changes in the socio-economic conditions during this long period of time are vital and relevant for the purpose as to whether the plan for alignment of road, which has remained unimplemented, would be any further feasible or practical. Admittedly, for all these years, no assessment has been made by the respondent authorities regarding the requirement of keeping the plan for regular line of the street alive. This militates with the provisions under section 357(6) of the Kolkata Municipal Corporation Act 1980, which has provided for cancellation, wholly or partly or modification of the regular line of a public street after a period of 10 years from the date of its being defined, in case the object for which the said regular line was defined, has not been completed. In this respect, the Court conquerors with the submissions made on behalf of the petitioner that, even in the Old Act of 1951, provisions have been made for revisiting the reason and justification