Lots of extensions to the system have opened since then, with more that are currently being built or proposed. Metrolink now has lines that serve Didsbury, Ashton-under-Lyne, Oldham, Rochdale, MediaCityUK and Manchester Airport. These expansions increased the system's length from 37 km to 97 km with 99 stops. Sometime in 2017 there will be a second line through Manchester city centre serving Exchange Square, and another line towards the Trafford Centre shopping mall before the end of the decade. There are also plans for tram-train lines to Stockport and other places in Greater Manchester.