Lee, thanks and great work. I think that a lot of us have wanted truck traffic on our layout in addition to trains, and you are showing us the possiblities. I can currently run two O and one On30 train simultaneously (with two other trains staged and ready to go), it would be very cool to add the action of a highway and have some 18 wheelers running at the same time.
Now I have to figure out where I can add a highway to the layout!