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Signals: A Rail Signal Reference

By Matthew Patenaude

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Around the world, the movement of trains is governed by signals placed next to or above tracks. One of the methods of displaying those signals is with colored lights, lighted in a particular order. Signals allows you to look up the meaning of a given signal aspect right from your iPhone or iPod touch.

Currently, Signals only supports colored light signals, using aspects and indications as specified in "NORAC Operating Rules, 9th Edition," by the Northeast Operating Rules Advisory Committee, which covers most of Amtrak's system, and several smaller commuter lines within the United States. In the future, we may expand to cover more rule books.

Note: this application is for entertainment purposes only, and should not be relied on for factual accuracy when driving an actual train. Hopefully, though, a certified locomotive engineer wouldn't need to look up signal indications while driving.

iPhone Screenshots

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Customer Reviews

Almost perfect...

I happen to be a locomotive engineer for a short line freight railroad... Most of the signals are accurate but there are an entire segment missing. Pot signals and dwarf signals are missing and a few of the norac high stand signals are missing... This would have been a great tool when memorizing signal indications while in training, very nice to see this in the app store! Didn't see a medium approach medium and a medium advance approach in the aspects....

Needs to be expanded.

It's a useful app for memorizing signals, however, there are a lot of signals missing. Not just dwarf, etc., but signals with different light patterns as well as diverging signals. Frankly, I've had more practice by identifying the signals that aren't in the app than with the signals that are. Not saying it's bad, it's just missing a lot of information that would change this from a good tool to a great tool.

Matt, your awesome

Why you made this, I don't know... But i'm glad to see that your making iPhone apps. From the screenshots above, it looks very well done. Look forward to trying it out


Signals: A Rail Signal Reference
View in iTunes
  • Free
  • Category: Reference
  • Released:
  • Version: 1.0
  • Size: 1.5 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 3.0 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

Current Version: