I would try this:

Take the road (lines) and buffer using a Bufferer transformer (cap type none, size up to you).

Then split the buffered area into left and right using the LineonAreaOverlayer and output Area.

Then use the PointonAreaOverlayer to list the address points inside the buffered areas.

If those address points are only even or odd you have no mix, else they are mixed.

Hope this helps you get started.