With metal poles and ladders,
these scale signals will look great along your right-of-way. The
3-position flag has a realistic slow motion. 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.
