The scheme for the seven-kilometre-long South Island Line (East) was gazetted by the government yesterday. Work on the proposed railway line is expected to last from 2011 to 2015, and the service is expected to help reduce traffic in Southern District, particularly at the Aberdeen Tunnel. It would carry passengers from South Horizons to Admiralty in about nine minutes, compared with 25 to 45 minutes in road-based transport during rush hour now, a government spokesman said.