The Block Signal

The movie is delightful with plenty of 1926 attire and a few steam locomotives which was my primary interest in this show.

There are plenty of references to BLOCK SIGNALS which were often shown in the movie to be semaphore signals which have both lights and swing arms to indicate whether or not upcoming blocks are occupied by other trains.

What I perceived as being developed was a form of AUTOMATIC TRAIN STOP on the locomotive to prevent the steam locomotive from going past a Block Signal if it shows that the block ahead is occupied, regardless of the Engineer's condition.

Just for what it is worth... which is not much. Thanks for listening.