They can even cover up a layout's secrets ... The operational usage can range from a single car to a large unit train based on the traffic value and demand to the modeler's imagination.

If your layout is in your workshop ... especially if you have a rail cleaning car as part of your regular consists. (You can ...

the track in N-scale layouts is 9 mm wide, meaning that the whole system had to fit in just 23 x 20 mm 2, the frontal area of a typical train car. One of the few cameras that fit within that ...