CN Signals Flash Cards (USOR) Download from App Store
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CN Signals Flash Cards (USOR) app for iPhone and iPad


4.4 ( 3584 ratings )
Education
Developer: AllRail Inc.
Free
Current version: 1.0, last update: 7 years ago
First release : 10 Sep 2016
App size: 5.8 Mb

An educational application for CN employees to study USOR block and interlocking signals using flash cards. One side of a presented card is the signal image, the user may then “click” to flip the card over to reveal the signals name and indication.