Staring june 10, three stations along the RT No. 3, or the city's longer elevated metro line, will suspend service while tests are done on a new signaling system and a sinking foundation is bolstered, city authorities announced yesterday.

　　The three stations, namely Shilong Road Station, Longcao Road Station and Caoxi Road Station located at the line's southern end, will be closed for 60 days. Then Yishan Road station will serve as the southern terminal of the line leading to Jiangwan Township in the north. Local public transport authorities have prepared buses to link the closed stations. After the 60-day period, the interval between trains on the line will be reduced from the current 7.5 minutes to 6 minutes. The line, which went into service in 2000, carries about 250,000 passengers every day.