I think that maaacus is trying to make the line between waypoints of a route thinner. As far as I know it is not possible to change that with typ-ing since it is not a part of the map but rather something that is in the firmware of the unit rather. or am i wrong? I would also love to have the purple lines less significant since it as maaacus say can cover the road.
One workaround is to place the waypoints in a way that the lines does not cover roads but it is easier said than done...