Great idea for a Thread Vio
Great spotting the blue track over the white viaduct, weird they would do that. You can actually see how the entering and exiting blue rails are at a slight angle up, to accommodate the blue rail being on top of the white rail of the viaduct. Hmmm, since the original viaducts with built in rails and the original piers are about a quarter inch lower than the modern ones...I wonder if this method would work out perfectly on the newer styles? Next time I have those out I will have to give it a try.
Also notice that there are not Piers on either end of the white viaduct which, because there are no lips on the white version, would have to be used so the rails would not fall when a train passes over their connection points.
Great spotting the blue track over the white viaduct, weird they would do that. You can actually see how the entering and exiting blue rails are at a slight angle up, to accommodate the blue rail being on top of the white rail of the viaduct. Hmmm, since the original viaducts with built in rails and the original piers are about a quarter inch lower than the modern ones...I wonder if this method would work out perfectly on the newer styles? Next time I have those out I will have to give it a try.
Also notice that there are not Piers on either end of the white viaduct which, because there are no lips on the white version, would have to be used so the rails would not fall when a train passes over their connection points.
![[-]](https://www.blueplastictracks.org/images/collapse.png)