CHENNAI: For the first time in Tamil Nadu, the Chennai Metropolitan Development Authority (CMDA) is mulling increasing the floor space index (FSI) for properties located along Chennai Metro Rail and MRTS corridors to 6.5. The earlier maximum permissible FSI limit across the state was 4.87. According to sources, the move is aimed at intensifying commercial development along transit lines, improving accessibility and mobility for jobs, and creating affordable housing in transit-oriented development zones.