Here is a solution that might be more elegant. I am making a comparison to the music program Logic Pro for explanation. Here you can hide audio tracks.
That could be used on routes, scenarios and even consists in quickdrive.
It would go like this. Have a little hide tickbox in the mentioned items. Have a master hide tickbox somewhere. When that box is ticked, all items marked hide is hidden. And when not, all items marked are shown.
That way we get much more user flexibility, than an auto-hide function.
oldsnake track lenght would be much preffered if possible. When driving mountain routes with bends and twisted valleys, it is really wierd to see the distance to a stop increasing.