now days we need more connectivity to all major cities ( NDLS-CSTM, NDLS-MAS, NDLS-ADI, NDLS-HWH, NDLS-SC, NDLS-SBC, MAS-HWH, MAS-CSTM, MAS-ADI, HWH-CSTM) and we don't have enough tracks( 2 tracks not enough) at least we need 4 tracks to connect major cities.