Just thought I would let people know that I am repairing the Hume Freeway in country Victoria, Australia. Using exising GPS tracks and the knowledge I have collected from a few recent trips I have had on the freeway (before I had any GPS :( ) I am aligning the carriageways to the most dense lines of the GPS traces, updating and adding tags such as ref=NHM31, maxspeed=110 and lanes=2. Rest areas and interchanges are also being mapped if there is GPS data available. If there is no GPS for an on/offramp but I know it exists, I will roughly draw it in.