Here we see an interesting situation at the old 67TH ST tower on the Metra Electric division. This outbound train is wrong railing on the South Chicago Branch and just passed the 114 signal, displaying a Restricting indication. The logic of the old GRS Model 5 interlocking machine is such that the signal will continue to display even if there is a train occupying the track.
Of course US&S would never stand for such signaling shortcuts. You can bet when a train passed the 60R signal displaying Restricting at THORN interlocking, it would drop to Stop.
Sometimes a Restricting was just an inexpensive way to signal low speed crossovers, as seen here at Metra's TOWER A-5 and UP's KEDZIE interlockings.
Here we see the eastbound PRR PL signal gantry at CP-GRAY with the track 1 signal displaying a Restricting indication. More often than not freight railroads do a pretty good job keeping signals at Stop so this one must be fleeted for a wave of eastbound movements.
This photo illustrates the use of lowest yellow Restricting with the middle middle head. Here a light engine move is heading into the yard at Clinton. TN as an osprey takes flight.
Moving into N&W territory I managed to catch a route lined for the yard in Shenandoah, VA.
Yards are a pretty popular place to catch Restricting indications, like this one at EAST BRUNSWICK as displayed on a B&O CPL.
Here is another example of a train being signaled into a yard, this time at Collier, VA on the old SCL A-Line. This example shows how the Seaboard would need to find space on the US&S N-3 elephant ears for the awkward 4th color.
Finally in Bluefield, WV we see an automatic N&W style position light with a fixed Restricting indication. Simple in operation, but stunning in the right light.