Section 39(2) in Tamil Nadu Combined Development and Building Rules, 2019
(2)Road width. - The site shall either abut on a road not less than 18 meters in width or gain access from public road not less than18 meters in width through a part of the site which can be treated as an exclusive passage of not less than 18 meters in width.Provided further that High Rise building may be permitted with limitations on maximum FSI of the building on a site abutting or gaining access from a public road of min. 12 m or 15 m in width, or gain access from public road not less than 12 m or 15 m in width through an exclusive passage of not less than 12 m or 15 m in width, subject to compliance of the planning parameters according to the table below
