Here are a few references for the signals that used to be at the south entrance to Union Station in Chicago.  They are nicknamed "Domino" signals, for obvious reasons.

If you notice the first, slightly gray version, it shows an aspect which is not possible.  This may be because of a "screw-up" with the guy that was doing the artwork - as the signal cannot display what is shown.  It also does not show the restricting indication.

In the second set of illustrations, I am missing page 25 (and maybe page 26) showing the stop aspects.

The last indication chart comes from the 1925 article that appeared in the March issue of RAILWAY SIGNALING.

My guess, is that after the original installation in the 20's, when the signals could display 5 indications, they decided to add "stop and proceed" to the mix.

According to one source I came across, these signals also appeared somewhere in New Jersey, but I have not confirmed this.

What do you think?  Think this shot was set up for the article?  :-)

At the Illinois Railway Museum, in an untypical installation

Photograph by Tim Vermande in the mid 70's
This is the only picture I have seen of the signals in service!
A big thanks to Tim for sharing

The complete CUS track plan stitched together from the article:

The complete Railway Signaling article:


I love trains, and I love signals.  I am not an expert.  My webpages reflect what I find on the topic of the page.  This is something I have fun with while trying to help others.

Please Note:  Since the main focus of my two websites is railroad signals, the railfan guides are oriented towards the signal fan being able to locate them.  For those of you into the modeling aspect of our hobby, myindexa page has a list of almost everything railroad oriented I can think of to provide you with at least a few pictures to help you detail your pike.

If this is a railfan page, every effort has been made to make sure that the information contained on this map and in this railfan guide is correct.  Once in a while, an error may creep in :-)

My philosophy: Pictures and maps are worth a thousand words, especially for railfanning.  Text descriptions only get you so far, especially if you get lost or disoriented.  Take along good maps.... a GPS is OK to get somewhere, but maps are still better if you get lost!  I belong to AAA, which allows you to get local maps for free when you visit the local branches.  ADC puts out a nice series of county maps for the Washington DC area, but their state maps do not have the railroads on them.  If you can find em, I like the National Geographic map book of the U.S..... good, clear, and concise graphics, and they do a really good job of showing you where tourist type attractions are, although they too lack the railroads.  Other notes about specific areas will show up on that page if known.

Aerial shots were taken from either Google Maps or www.bing.com/maps as noted.  Screen captures are made with Snagit, a Techsmith product... a great tool if you have never used it! 

By the way, floobydust is a term I picked up 30-40 years ago from a National Semiconductor data book, and means miscellaneous and/or other stuff.

Pictures and additional information is always needed if anyone feels inclined to take 'em, send 'em, and share 'em, or if you have something to add or correct.... credit is always given!  Please be NICE!!!  Contact info is here

Beware: If used as a source, ANYTHING from Wikipedia must be treated as being possibly being inaccurate, wrong, or not true.


NEW 11/23/2017
Last Modified 23-Nov-2017