According to the layout city buses will be categorized into four groups: Fast transport, Major transport, Common transport and Auxiliary transport. Half of the city buses will be equipped with air- conditioners and 220 lines be put into operation reaching an overall length of 3100 kilometers. Fushan Bay will become a transport hub linking the Liuting Airport, Sifang, Cangkou, Yangkou, Huangdao Island and Hongdao Island. 20 bus centers and 50 to 60 bus terminals located near residential areas, commercial centers, docks, parks and sports facilities will be built by 2010. Future passengers in Qingdao will be able to reach a bus stop within 700 meters and spend less than 60 minutes in transit.