In answer to a recent post by RobbersBaron and Hawk (jan 2011 -huh), laying triple or quad tracks is a mother of an enterprise
First, you can't lay one section of track, they have to be long enough to break from the point of origin. That makes really weird curves.
Second, you have to make another weird curve from that first 'sprite'. If you are lucky, you can pull a third section more or less the way you want.
Thirdly, erasing the unwanted parts will hit your wallet heavily.
I have tried, really tried and finally gave up.