It will be used after the new line from Takkolam gets connected to AJJ. New CJ/CGL trains will be started from there... current TPTY Passenger/LTT-MDU express/CSTM-NCJ express will come from TRT and take Melpakkam byepass (YPR Duronto takes that now ) , later it will join the new line at Melpakkam and it will proceed to Takkolam. By this it will skip Arakkonam here on and it will get Electric loco