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.