With metal poles and ladders, these scale signals will look great along your right-of-way. The 3-color signal features prototypical fade-out and fade-in changes from one color to the next color. The base has optical sensors built-in with a sensitivity adjustment. Just apply power and put them next to the track. These signals do the rest.
They have separate inputs and outputs so they can be daisy chained. The down track signal will hold the up track signal on yellow until the down track signal goes off red.