In 2004, STIB/MIVB commissioned a planning document called "STIB/MIVB 2020". Suggestions were made as to future plans, but these will not be enacted before completion of the north- and southbound lines. One suggestion included the construction of a new branch from Merode to Trône/Troon via Brussels-Luxembourg railway station. This would help to relieve congestion on the central parts of lines 1/5. There may be a further metro line running south-west from Luxembourg station to Ixelles, /, and the /. Luxembourg station would become a major transfer point. The plan also hopes to improve connections between Brussels-South railway station, Schuman station, and Luxembourg station.