Factorio Forums

Simply a piece of rail that sends a signal if there's a train above it.

As far as I know there is no apparatus that can detect a train (a moving train anyway) so that would be handy.

Uhm... viewtopic.php?f=194&t=32994

See also viewtopic.php?f=6&t=29978 Allow rail to be connected to the circuit/logistic network