Rule based handling of Lists

Background:

I am maping a system of marked trails in a national park. There are dedicated trails for hiking, short walks, skiing, cycling, snow mobiles, snow shoes and what have you. In short it looks like someone droped a bowl of noodles over the place. In many places there are many uses for the same trail section, and it is these overlaping sections that I am trying to clean up.

I have used LineOnLineOverlayer to find the overlaping sections and have created a List over the attributes that identify the type of trail, but from there I have not found the tools to move on. What I would like to do next is to break appart the overlaping sections from their original longer lines and apply a number of sorting rules to the List. Some examples: Where hiking and skiing overlap I would like to delete all but one polyline and give this a new code. If there is a Nature trail I would like to delete everything else but that. If there is a cycling trail I would like to keep that for later regardles of what else there might be. And so on. Is there a transformer for Lists similar to TestFilter? If not, what would be an alternative method to accieve the above?

Lastly I would like to offset some of the trail types, eg cycling. I have not tried this yet but hope that

OffsetCurveGenerator will do the trick, if not I might have to pester you with more questions.

The final output will be output to a shape file for final styling in Illustrator.